Title 42The Public Health and WelfareRelease 119-73

§4121 Definitions

Title 42 › Chapter CHAPTER 50— - NATIONAL FLOOD INSURANCE › Subchapter SUBCHAPTER IV— - GENERAL PROVISIONS › § 4121

Last updated Apr 6, 2026|Official source

Summary

Defines words used for the federal flood insurance rules so people know what counts as a flood, who counts as an insurer or lender, and what other key terms mean. It says floods can mean lots of kinds of water damage (rising or overflowing waters, storm surges, abnormally high tides, tidal waves, tsunamis, hurricanes, and other severe storms). It also says floods include mudslides caused by water buildup and shoreline collapse or sinking from erosion or undermining by waves or currents that go beyond normal cycles. The Federal Emergency Management Agency (FEMA) Administrator can write rules to set exact meanings and to make the law work for mudslides and shoreline collapse. Flood — water inundation from rising or overflowing waters, storm surges, tides, tsunamis, hurricanes, or similar events; FEMA can set the exact definition. United States/State (geographic) — includes the States, the District of Columbia, U.S. territories and possessions, Puerto Rico, and the Trust Territory of the Pacific Islands. Insurance company/other insurer/agent or broker — any person or organization allowed to do insurance under state law, certain entities subject to Securities Exchange Act reporting rules, or those FEMA authorizes to take reinsurance. Insurance adjustment organization — people or groups that handle insurance loss claims. Person — any individual, group, company, association, or government body. Administrator — the FEMA Administrator. Repetitive loss structure — a building with flood insurance that had flood damage twice, where each repair cost averaged at least 25 percent of the building’s value, and the policy had increased cost of compliance coverage at the time of the second flood. Federal agency lender — a federal agency that makes direct loans secured by improved real estate or a mobile home when acting as a lender. Federal entity for lending regulation — the Federal Reserve Board, FDIC, Comptroller of the Currency, NCUA, Farm Credit Administration, or the agency that mainly supervises a particular lender. Improved real estate — land with a building on it. Lender — a regulated lending institution or a federal agency lender. Regulated lending institution — banks, savings and loans, credit unions, farm credit banks, Federal land bank associations, production credit associations, or similar supervised institutions. Servicer — the person who takes the borrower’s payments and makes required payments like principal, interest, taxes, and insurance. Substantially damaged structure — a building with flood insurance whose repair costs exceed the amount set by FEMA rules or a community ordinance, whichever is lower.

Full Legal Text

Title 42, §4121

The Public Health and Welfare — Source: USLM XML via OLRC

(a)As used in this chapter—
(1)the term “flood” shall have such meaning as may be prescribed in regulations of the Administrator, and may include inundation from rising waters or from the overflow of streams, rivers, or other bodies of water, or from tidal surges, abnormally high tidal water, tidal waves, tsunamis, hurricanes, or other severe storms or deluge;
(2)the terms “United States” (when used in a geographic sense) and “State” includes the several States, the District of Columbia, the territories and possessions, the Commonwealth of Puerto Rico, and the Trust Territory of the Pacific Islands;
(3)the terms “insurance company”, “other insurer” and “insurance agent or broker” include any organization or person that is authorized to engage in the business of insurance under the laws of any State, subject to the reporting requirements of the Securities Exchange Act of 1934 [15 U.S.C. 78a et seq.] pursuant to section 13(a) or 15(d) of such Act (15 U.S.C. 78m(a) and 78o(d)), or authorized by the Administrator to assume reinsurance on risks insured by the flood insurance program;
(4)the term “insurance adjustment organization” includes any organizations and persons engaged in the business of adjusting loss claims arising under insurance policies issued by any insurance company or other insurer;
(5)the term “person” includes any individual or group of individuals, corporation, partnership, association, or any other organized group of persons, including State and local governments and agencies thereof;
(6)the term “Administrator” means the Administrator of the Federal Emergency Management Agency;
(7)the term “repetitive loss structure” means a structure covered by a contract for flood insurance that—
(A)has incurred flood-related damage on 2 occasions, in which the cost of repair, on the average, equaled or exceeded 25 percent of the value of the structure at the time of each such flood event; and
(B)at the time of the second incidence of flood-related damage, the contract for flood insurance contains increased cost of compliance coverage.11 So in original. The period probably should be a semicolon.
(8)the term “Federal agency lender” means a Federal agency that makes direct loans secured by improved real estate or a mobile home, to the extent such agency acts in such capacity;
(9)the term “Federal entity for lending regulation” means the Board of Governors of the Federal Reserve System, the Federal Deposit Insurance Corporation, the Comptroller of the Currency, the National Credit Union Administration, and the Farm Credit Administration, and with respect to a particular regulated lending institution means the entity primarily responsible for the supervision of the institution;
(10)the term “improved real estate” means real estate upon which a building is located;
(11)the term “lender” means a regulated lending institution or Federal agency lender;
(12)the term “natural and beneficial floodplain functions” means—
(A)the functions associated with the natural or relatively undisturbed floodplain that (i) moderate flooding, retain flood waters, reduce erosion and sedimentation, and mitigate the effect of waves and storm surge from storms, and (ii) reduce flood related damage; and
(B)ancillary beneficial functions, including maintenance of water quality and recharge of ground water, that reduce flood related damage;
(13)the term “regulated lending institution” means any bank, savings and loan association, credit union, farm credit bank, Federal land bank association, production credit association, or similar institution subject to the supervision of a Federal entity for lending regulation;
(14)the term “servicer” means the person responsible for receiving any scheduled periodic payments from a borrower pursuant to the terms of a loan, including amounts for taxes, insurance premiums, and other charges with respect to the property securing the loan, and making the payments of principal and interest and such other payments with respect to the amounts received from the borrower as may be required pursuant to the terms of the loan; and
(15)the term “substantially damaged structure” means a structure covered by a contract for flood insurance that has incurred damage for which the cost of repair exceeds an amount specified in any regulation promulgated by the Administrator, or by a community ordinance, whichever is lower.
(b)The term “flood” shall also include inundation from mudslides which are proximately caused by accumulations of water on or under the ground; and all of the provisions of this chapter shall apply with respect to such mud-slides in the same manner and to the same extent as with respect to floods described in subsection (a)(1), subject to and in accordance with such regulations, modifying the provisions of this chapter (including the provisions relating to land management and use) to the extent necessary to insure that they can be effectively so applied, as the Administrator may prescribe to achieve (with respect to such mudslides) the purposes of this chapter and the objectives of the program.
(c)The term “flood” shall also include the collapse or subsidence of land along the shore of a lake or other body of water as a result of erosion or undermining caused by waves or currents of water exceeding anticipated cyclical levels, and all of the provisions of this chapter shall apply with respect to such collapse or subsidence in the same manner and to the same extent as with respect to floods described in subsection (a)(1), subject to and in accordance with such regulations, modifying the provisions of this chapter (including the provisions relating to land management and use) to the extent necessary to insure that they can be effectively so applied, as the Administrator may prescribe to achieve (with respect to such collapse or subsidence) the purposes of this chapter and the objectives of the program.

Legislative History

Notes & Related Subsidiaries

Editorial Notes

References in Text

This chapter, referred to in text, was in the original a reference to “this title” meaning title XIII of Pub. L. 90–448, Aug. 1, 1968, 82 Stat. 572, known as the National Flood Insurance Act of 1968, which is classified principally to this chapter. For complete classification of this Act to the Code, see

Short Title

note set out under section 4001 of this title and Tables. The Securities Exchange Act of 1934, referred to in subsec. (a)(3), is act June 6, 1934, ch. 404, 48 Stat. 881, which is classified principally to chapter 2B (§ 78a et seq.) of Title 15, Commerce and Trade. For complete classification of this Act to the Code, see section 78a of Title 15 and Tables.

Amendments

2012—Subsec. (a)(1). Pub. L. 112–141, § 100238(b)(1), substituted “Administrator” for “Director”. Subsec. (a)(3). Pub. L. 112–141, § 100232(d)(5), substituted “include any organization or person that is authorized to engage in the business of insurance under the laws of any State, subject to the reporting requirements of the Securities Exchange Act of 1934 pursuant to section 13(a) or 15(d) of such Act (15 U.S.C. 78m(a) and 78o(d)), or authorized by the Administrator to assume reinsurance on risks insured by the flood insurance program;” for “include any organizations and persons authorized to engage in the insurance business under the laws of any State;”. Subsec. (a)(6). Pub. L. 112–141, § 100238(b)(1), substituted “Administrator” for “Director” in two places. Subsec. (a)(9). Pub. L. 112–141, § 100238(b)(3), struck out “the Office of Thrift Supervision,” after “the Comptroller of the Currency,”. Subsecs. (a)(15), (b), (c). Pub. L. 112–141, § 100238(b)(1), substituted “Administrator” for “Director”. 2004—Subsec. (a)(7). Pub. L. 108–264, § 105(b)(1), added par. (7) and struck out former par. (7) which read as follows: “the term ‘repetitive loss structure’ means a structure covered by a contract for flood insurance under this chapter that has incurred flood-related damage on 2 occasions during a 10-year period ending on the date of the event for which a second claim is made, in which the cost of repair, on the average, equaled or exceeded 25 percent of the value of the structure at the time of each such flood event;”. Subsec. (a)(15). Pub. L. 108–264, § 105(b)(2)–(4), added par. (15). 1994—Subsec. (a)(7) to (14). Pub. L. 103–325 added pars. (7) to (14). 1988—Subsecs. (b), (c). Pub. L. 100–628 substituted “subsection (a)(1)” for “paragraph (1)”. 1983—Subsec. (a)(1). Pub. L. 98–181, § 451(d)(1), substituted “Director” for “Secretary”. Subsec. (a)(6). Pub. L. 98–181, § 451(d)(8), substituted definition of “Director” as the Director of the Federal Emergency Management Agency for definition of “Secretary” as the Secretary of Housing and Urban Development. Subsecs. (b), (c). Pub. L. 98–181, § 451(d)(1), substituted “Director” for “Secretary”. 1973—Subsec. (b). Pub. L. 93–234, § 107, inserted “proximately” before “caused”. Subsec. (c). Pub. L. 93–234, § 108(b), added subsec. (c). 1969—Pub. L. 91–152 designated existing provisions as subsec. (a) and added subsec. (b).

Statutory Notes and Related Subsidiaries

Effective Date

Section effective 120 days following Aug. 1, 1968, or such later date prescribed by the Secretary but in no event more than 180 days following Aug. 1, 1968, see section 1377 of Pub. L. 90–448, set out as a note under section 4001 of this title.

Transfer of Functions

For transfer of all functions, personnel, assets, components, authorities, grant programs, and liabilities of the Federal Emergency Management Agency, including the functions of the Under Secretary for Federal Emergency Management relating thereto, to the Federal Emergency Management Agency, see section 315(a)(1) of Title 6, Domestic Security. For

Transfer of Functions

, personnel, assets, and liabilities of the Federal Emergency Management Agency, including the functions of the Director of the Federal Emergency Management Agency relating thereto, to the Secretary of Homeland Security, and for treatment of related references, see former section 313(1) and section 551(d), 552(d), and 557 of Title 6, Domestic Security, and the Department of Homeland Security Reorganization Plan of November 25, 2002, as modified, set out as a note under section 542 of Title 6.

Executive Documents

Termination of Trust Territory of the Pacific Islands For termination of Trust Territory of the Pacific Islands, see note set out preceding section 1681 of Title 48, Territories and Insular Possessions.

Reference

Citations & Metadata

Citation

42 U.S.C. § 4121

Title 42The Public Health and Welfare

Last Updated

Apr 6, 2026

Release point: 119-73