Occupational Safety and Health Act — OSHA Regulatory Authority

The Occupational Safety and Health Act of 1970 (OSH Act), 29 U.S.C. §§ 651–678, created the federal government's comprehensive workplace safety regulatory program — authorizing the Occupational Safety and Health Administration (OSHA) to set and enforce standards governing conditions in American workplaces, from fall protection on construction sites to chemical exposure limits in factories to bloodborne pathogen procedures in hospitals. Congress enacted the OSH Act after decades in which workplace injuries and deaths — approximately 14,000 annually in 1970 — were viewed as an inevitable cost of industrial production rather than preventable regulatory failures. The Act's "general duty clause" (29 U.S.C. § 654) requires every employer to provide a workplace "free from recognized hazards that are causing or are likely to cause death or serious physical harm" — a broadly written obligation that OSHA has invoked to address hazards not covered by specific standards. The OSH Act became the center of a major constitutional battle in 2022: National Federation of Independent Business v. OSHA held that the Biden administration's emergency temporary standard requiring large employers (100+ employees) to mandate COVID-19 vaccination or weekly testing exceeded OSHA's statutory authority under the major questions doctrine. The Supreme Court's per curiam opinion — applying the major questions doctrine to hold that Congress had not clearly authorized OSHA to address a public health emergency as broad as COVID-19 — significantly constrained OSHA's authority to issue sweeping economy-wide regulations and solidified the major questions doctrine as a major limit on administrative agency power.

Current Law (2026)

Legal Authority

• 29 U.S.C. § 651 — Congressional findings and purpose: to assure safe and healthful working conditions for working men and women; to preserve human resources; to stimulate employers and employees in their efforts to reduce hazards
• 29 U.S.C. § 654 — General duties of employers and employees; the "general duty clause" (§ 654(a)(1)) requires a hazard-free workplace; employees must comply with applicable OSHA rules (§ 654(b))
• 29 U.S.C. § 655 — Standards promulgation authority; OSHA may adopt national consensus standards, proprietary standards, and issue new standards; emergency temporary standards (ETS) may be issued when employees face "grave danger" from exposure to substances or agents determined to be toxic or physically harmful or from new hazards; normal standard must be issued within six months of ETS
• 29 U.S.C. § 657 — Inspections, investigations, and recordkeeping; OSHA inspectors may enter workplaces; Marshall v. Barlow's (1978) requires warrants for non-consented inspections
• 29 U.S.C. § 659 — Employer contest rights; employer may contest citations within 15 working days; occupational safety review by Occupational Safety and Health Review Commission (OSHRC)
• 29 U.S.C. § 666 — Civil and criminal penalties; civil penalty structure; criminal penalties for willful violations causing death
• Industrial Union Department, AFL-CIO v. American Petroleum Institute (Benzene case), 448 U.S. 607 (1980) — OSHA must establish that a substance poses "significant risk" of harm before regulating it; the Act does not authorize regulating de minimis risks; plurality opinion; the first major check on OSHA rulemaking
• American Textile Manufacturers Institute v. Donovan (Cotton Dust case), 452 U.S. 490 (1981) — OSHA need not conduct cost-benefit analysis; the Act requires standards that are "feasible," not economically optimal; Congress chose technology-forcing standards over cost-benefit balancing
• Marshall v. Barlow's, Inc., 436 U.S. 307 (1978) — Fourth Amendment requires OSHA to obtain an administrative warrant for non-consented workplace inspections; OSHA may use area-wide inspection programs or specific-evidence to obtain warrants
• National Federation of Independent Business v. OSHA, 595 U.S. 109 (2022) — Per curiam; stayed and effectively invalidated the vaccine-or-test ETS for large employers; the major questions doctrine requires Congress to clearly authorize OSHA to impose economy-wide vaccination requirements; this is not a workplace-specific hazard but a general public health measure Congress did not clearly delegate to OSHA

Key Mechanics

The OSH Act operates through two tracks. Standards-based enforcement: OSHA issues specific standards for defined hazards (permissible exposure limits for toxic chemicals, fall protection requirements, bloodborne pathogen procedures) through notice-and-comment rulemaking; compliance with a specific standard is mandatory; violations trigger civil penalties (up to $16,550 per violation in 2026; $165,514 for willful or repeated). General Duty Clause enforcement (§ 654(a)(1)): OSHA may cite an employer for any "recognized hazard" causing or likely to cause death or serious physical harm, even without a specific standard — used for novel hazards, ergonomics, heat stress, and COVID-19 before any specific standard was in place. Emergency Temporary Standards (ETS) may be issued for "grave danger" without normal notice-and-comment but expire in 6 months unless a permanent standard is finalized; NFIB v. OSHA (2022) invalidated the Biden COVID vaccine-or-test ETS on the grounds that OSHA lacks authority to issue economy-wide public health mandates that go beyond workplace-specific hazards — the major questions doctrine requires clear congressional authorization for such sweeping regulations. Post-Loper Bright (2024), courts independently interpret the OSH Act's scope without deferring to OSHA's own reading. The tripartite structure separates OSHA (enforcement) from the Occupational Safety and Health Review Commission (OSHRC) (independent adjudication of contested citations) from NIOSH (research and recommendations). Twenty-two states operate OSHA-approved state plans covering private sector employees and must meet minimum federal standards.

How It Works

The OSH Act's Framework

The OSH Act created a tripartite structure for federal workplace safety regulation. OSHA (within the Department of Labor) sets and enforces standards. The Occupational Safety and Health Review Commission (OSHRC) — an independent agency — adjudicates contested citations through administrative law judges. The National Institute for Occupational Safety and Health (NIOSH, within CDC) conducts research and recommends standards to OSHA. Courts review OSHRC decisions under the APA.

The Act covers most private sector employers in the United States and their employees. Federal government employees are covered under separate executive orders. State and local government employees may be covered if the state has an OSHA-approved state plan. Independent contractors (not employees) are not covered by the OSH Act — a significant gap given the growth of gig economy work.

Standards: Specific Rules and the General Duty Clause

OSHA issues two types of requirements. Specific standards (29 U.S.C. § 655) govern particular hazards: fall protection, respiratory protection, permit-required confined spaces, hazard communication (chemical labeling), bloodborne pathogens, lockout/tagout procedures, and hundreds of others. Industry-specific standards cover construction, maritime, and agriculture. Employers in covered industries must comply with applicable specific standards; citations for violations of specific standards are relatively straightforward to issue.

The general duty clause (29 U.S.C. § 654(a)(1)) fills gaps where no specific standard exists. To establish a general duty clause violation, OSHA must show: (1) the employer failed to keep the workplace free from a hazard; (2) the hazard was recognized by the employer or industry; (3) the hazard caused or was likely to cause death or serious physical harm; and (4) a feasible and effective means existed to eliminate or materially reduce the hazard. OSHA has used the general duty clause to address ergonomic hazards, workplace violence, heat illness, and COVID-19 transmission before adopting specific standards.

The Benzene Case (Industrial Union Department v. American Petroleum Institute, 1980) established a critical limit on OSHA rulemaking: OSHA must demonstrate that a substance poses a "significant risk" of harm before it may regulate it. OSHA cannot regulate de minimis risks to achieve zero risk; it must quantify the risk and show it is significant. The plurality opinion read this requirement into the OSH Act to avoid a potential nondelegation problem — giving OSHA unlimited power to set any standard it deemed protective would be an unconstitutional delegation of legislative power.

The Cotton Dust Case (American Textile Manufacturers Institute v. Donovan, 1981) held that OSHA need not perform cost-benefit analysis for health standards. The Act requires standards that are "technologically feasible" and "economically feasible" — meaning achievable by the industry without bankrupting it — but does not require that costs be proportionate to benefits. Congress made the policy choice to use technology-forcing standards rather than cost-benefit balancing; OSHA implements that choice.

Emergency Temporary Standards and the COVID Vaccine Mandate

29 U.S.C. § 655(c) authorizes OSHA to issue emergency temporary standards (ETS) without notice-and-comment rulemaking when employees are exposed to "grave danger" from exposure to toxic substances or new hazards. The ETS takes immediate effect and remains in force for up to six months while OSHA pursues a normal rulemaking for a permanent standard.

The Biden administration used the ETS authority in November 2021 to issue a COVID-19 vaccination-or-testing requirement for all employers with 100 or more employees. The ETS required these employers to either mandate vaccination or require weekly testing and masking for unvaccinated employees. It would have applied to approximately 84 million workers.

National Federation of Independent Business v. OSHA (2022) stayed the ETS and the Court's per curiam opinion effectively invalidated it. The major questions doctrine — articulated most fully in West Virginia v. EPA (2022), decided later the same term — provides that when an agency claims authority to take regulatory action of vast economic and political significance, Congress must have clearly granted that authority. OSHA's authority extends to occupational hazards — dangers that are characteristic of work and the workplace. COVID-19 is not a workplace-specific hazard; it is a universal risk that affects all persons regardless of employment. Congress did not clearly authorize OSHA to impose a vaccination regime on 84 million workers; such an action requires a "clear statement" of congressional authorization that the OSH Act does not contain.

The healthcare worker vaccine mandate — a separate rule issued by CMS under Medicare and Medicaid statutory authority — was upheld by the Supreme Court on the same day in Biden v. Missouri (2022). The contrast illustrates the major questions doctrine's application: CMS's authority to ensure quality of care in federally funded health facilities does clearly extend to requiring vaccination of workers who interact with vulnerable patients. OSHA's general worker safety authority does not clearly extend to a universal vaccination mandate for all large employers.

Inspections and Enforcement

OSHA conducts approximately 30,000–40,000 workplace inspections annually, with priority given to fatality and catastrophic incident investigations, imminent danger situations, formal employee complaints, programmed inspection targets (high-hazard industries), and follow-up inspections. Marshall v. Barlow's (1978) held that OSHA inspectors must obtain an administrative warrant if an employer refuses entry; warrants are obtainable based on neutral administrative plans for inspection programs, without requiring specific evidence of a violation.

Citations identify the standard allegedly violated, a proposed penalty, and an abatement deadline. Employers may contest citations within 15 working days to OSHRC. Most citations are resolved through informal settlement conferences. OSHRC administrative law judges hear contested cases; parties may seek full OSHRC review and then judicial review in the circuit courts.

How It Affects You

If you are an employee in a covered workplace: The OSH Act gives you the right to a safe workplace, the right to request an OSHA inspection without fear of retaliation, and the right to review employer injury logs and OSHA citations. If you report a safety violation to OSHA, your employer cannot legally retaliate against you — whistleblower protections under Section 11(c) of the OSH Act allow you to file a retaliation complaint with OSHA within 30 days of the adverse action. OSHA has no private right of action (employees cannot sue employers directly for OSHA violations), but you can file complaints, request inspections, and participate in enforcement proceedings. The general duty clause obligates your employer to address recognized hazards even where no specific standard exists — workplace violence, extreme heat, ergonomic hazards.

If you are an employer subject to OSHA: You must comply with all applicable OSHA standards for your industry and the general duty clause requirement of a hazard-free workplace. Develop and maintain a written injury and illness prevention program (IIPP); OSHA does not require a uniform IIPP format but expects documented hazard identification, training, and correction procedures. Report fatalities within 8 hours and in-patient hospitalizations, amputations, or eye losses within 24 hours. Post the OSHA 300A annual summary at worksites February 1 through April 30. After Loper Bright, OSHA standards will be more susceptible to legal challenge on ultra vires grounds — courts will independently assess whether specific standards are authorized by the OSH Act. Monitor OSHA rulemaking and enforcement guidance for your industry; enforcement priorities shift between administrations.

If you are an HR or safety professional: The NFIB v. OSHA decision confirms that OSHA cannot impose universal vaccination or testing requirements through the ETS mechanism for hazards that are not workplace-specific. For COVID and similar respiratory illness risks, OSHA may use specific standards or general duty clause enforcement for high-risk settings (health care, meat processing, close-contact industries) but not economy-wide mandates. OSHA's heat illness prevention rulemaking (proposed standard for outdoor and indoor heat) and falls-in-construction rules represent the traditional core of OSHA authority. Track OSHA's active rulemakings; the notice-and-comment process provides opportunities to comment on proposed standards.

If you are a constitutional law or administrative law practitioner: NFIB v. OSHA is a foundational major questions doctrine case decided alongside West Virginia v. EPA. Together they establish that OSHA (like EPA) cannot use general statutory authority to impose transformative, economy-wide regulatory regimes without clear congressional authorization. Post-Loper Bright, OSHA can no longer rely on Chevron deference for statutory interpretation of the OSH Act; courts independently determine whether specific standards, the ETS authority, and the general duty clause are being applied consistently with congressional authorization. Challenges to OSHA rulemakings in the Fifth Circuit (a common venue given OSHA enforcement in Texas) have produced significant anti-OSHA precedents; venue selection is critical for OSHA rule challenges.

State Variations

Twenty-two states and territories have OSHA-approved state plans that cover private sector employers within their borders. State plans must be "at least as effective as" federal OSHA; they may be more protective but not less. State plan states include California (Cal/OSHA), Michigan (MIOSHA), Washington (WISHA), North Carolina, Virginia, and others. Key differences:

California (Cal/OSHA): Among the most protective state OSHA programs. Cal/OSHA adopted a COVID-19 Prevention Emergency Temporary Standard in 2020 — before federal OSHA — and has been more aggressive in addressing ergonomic hazards, heat illness, and workplace violence. Cal/OSHA's penalties are frequently higher than federal OSHA's.

Federal OSHA vs. state plans: In state plan states, federal OSHA does not conduct enforcement against private employers — the state agency has primary jurisdiction. Federal OSHA retains oversight authority and can revoke state plan approval if the plan fails to be at least as effective as federal OSHA.

Federal employees: Covered under a separate executive order framework administered by the Department of Labor; not subject to OSH Act enforcement directly, but agencies must maintain safety programs consistent with OSHA standards.

State workers' compensation: Workers' compensation systems, administered by states, provide the primary compensation mechanism for workplace injuries; OSHA enforcement is separate and does not provide compensation to injured workers. The interaction between workers' compensation exclusive remedy provisions and OSHA enforcement is important — employees generally cannot sue employers directly for OSHA violations; workers' compensation is the remedy for injuries.

Implementing Regulations

The Department of Health and Human Services (through NIOSH/CDC) regulations implementing the OSH Act's education grant authority live at 42 CFR Part 86 — Grants for Education Programs in Occupational Safety and Health. Key provisions:

• § 86.10 — Defines two grant types: long-term training project grants (sustained occupational safety and health degree or certificate programs) and short-term training grants (intensive courses, workshops, and continuing education for practicing safety professionals)
• § 86.11 — Eligible applicants: any public or private educational or training agency or institution located in the United States; eligibility extends to universities, community colleges, and professional associations offering safety and health curricula
• § 86.13 — Project requirements: approved applications must specify curriculum content, qualified faculty, student stipend amounts, trainee selection procedures, and evaluation methods; NIOSH reviews these against the agency's research and training priorities
• § 86.14 — Award criteria: the Secretary awards grants from available funds after evaluating scientific merit, relevance to NIOSH priorities, applicant capability, and potential training impact; long-term grants typically run multi-year with renewal competition
• § 86.16 — Use of funds: grant funds must be used for allowable project costs (faculty, stipends, curriculum materials, equipment); cost-sharing with institutional funds is encouraged; funds may not supplant existing institutional support for safety programs
• § 86.18 — Grantee accountability: financial records must be maintained for 3 years post-grant; NIOSH may audit and require corrective action for misuse of funds

Section 21 of the OSH Act (29 U.S.C. § 670) specifically authorizes NIOSH to award grants for education and training programs that develop a workforce of occupational safety and health professionals. The primary vehicle for these grants is the NIOSH Education and Research Centers (ERC) program — university-based multidisciplinary centers that train occupational physicians, industrial hygienists, occupational health nurses, and safety engineers. The 42 CFR Part 86 framework governs both the ERC program and standalone specialty training grants. NIOSH also funds Total Worker Health research programs and health hazard evaluations at workplaces that generate training materials. Annual NIOSH training grant funding typically runs $30–$40 million across approximately 18 ERCs and other training programs, with each ERC receiving several million dollars per award cycle to sustain graduate-level academic programs that produce most of the nation's doctoral-level occupational safety and health professionals.

Pending Legislation

• Heat Illness Prevention Standard: OSHA published a proposed rule in 2024 establishing indoor and outdoor heat standards for workers; unprecedented federal heat standard; would require heat illness and injury prevention plans, water, rest, shade, and acclimatization protocols; rulemaking is ongoing
• Emergency Temporary Standard Authority reform: Post-NFIB v. OSHA, proposals to clarify or expand OSHA's ETS authority — or to limit it further — have been introduced; the major questions doctrine's application to ETS authority is uncertain for hazards that are more workplace-specific than COVID-19
• Workplace Violence prevention standard: OSHA has pursued rulemaking on healthcare and social service worker violence prevention; proposed standard has been long in development

Recent Developments

• 2022 — NFIB v. OSHA: Per curiam Supreme Court decision stayed and effectively invalidated the large-employer COVID vaccination-or-testing ETS; major questions doctrine requires clear congressional authorization for OSHA to impose economy-wide vaccination mandates; OSHA withdrew the ETS.
• 2022 — West Virginia v. EPA: The same term, the Court articulated the major questions doctrine at greater length in the EPA context; the principle applies equally to OSHA: when claiming broad transformative authority, agencies need a clear congressional statement.
• 2024 — Loper Bright Enterprises v. Raimondo: Eliminated Chevron deference; OSHA statutory interpretations receive no automatic deference; courts independently determine whether OSHA standards are within the Act's authorization; significant for OSHA rulemaking litigation going forward.
• 2024 — Heat illness proposed rule: OSHA proposed its first-ever heat standard, covering indoor and outdoor workers; one of the most significant OSHA rulemakings in decades; litigation likely upon finalization.
• 2025 — Trump administration OSHA rollback: The Trump administration rescinded several Biden-era OSHA initiatives and scaled back enforcement priorities; the heat standard proposed rule faces potential withdrawal; enforcement of COVID-related requirements has ended.