20,160 sections across 1,928 Iowa regulatory chapters.
R.21—85.20 Motor fuel and antifreeze tests and standards
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85.20(1) In the interest of uniformity, the tests and standards for motor fuel, including but not limited to renewable fuels such as ethanol blended gasoline, biodiesel, and biodiesel blended fuel, and components such as an oxygenate, raffinate natural gasoline and motor vehicle …
R.21—85.21 Tolerances on petroleum products measuring devices. All pumps or meters at filling
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stations may have a tolerance of not over five cubic inches per five gallons, minus or plus. All pumps or measuring devices of a large capacity shall have a maintenance tolerance of 50 cubic inches, minus or plus, on a 50-gallon test. An additional one-half cubic inch tolerance s…
R.21—85.22 Meter adjustments and tagging. If a meter is found to be incorrect and also capable of
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further adjustment, said meter shall be adjusted, rechecked and sealed. If a seal is broken for any cause other than by a state inspector, the department shall be promptly notified of same. 85.22(1) Companies specializing in testing and repairing gasoline and fuel oil dispensing …
R.21—85.23 Servicer’s license fee. The fee for a servicer’s license shall be $10
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This rule is intended to implement Iowa Code section 215.23. [ARC 7129C, IAB 12/13/23, effective 1/17/24]
R.21—85.24 Recording elements. All weighing or measuring devices shall be provided with
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appropriate recording or indicating elements, which shall be definite, accurate and easily read under any conditions of normal operation of the device. Graduations and a suitable indicator shall be provided in connection with indications and recorded representations designed to a…
R.21—85.25 Air eliminator. All gasoline or oil metering devices shall be equipped with an effective air
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eliminator to prevent passage of air or vapor through the meter. The vent from such eliminator shall not be closed or obstructed. This rule is intended to implement Iowa Code section 215.18. [ARC 7129C, IAB 12/13/23, effective 1/17/24]
R.21—85.26 Delivery outlets. No means shall be provided by which any measured liquid can be
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diverted from the measuring chamber of the meter or the discharge line therefrom. However, two or more delivery outlets may be installed, if automatic means is provided to ensure that liquid can flow from only one such outlet at one time and the direction of flow for which the me…
R.21—85.27 LP-gas delivery. In the delivery of LP-gas by commercial bulk trucks (bobtail) across
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state lines, it shall be mandatory for all trucks delivering products in Iowa to be equipped with a meter that has been licensed by the state of Iowa and carries the seal of an accredited meter service and proving company. This rule is intended to implement Iowa Code section 215.…
R.21—85.28 LP-gas meter registration. The location of all LP-gas liquid meters in retail trade shall be
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listed, by the owner, with the department. Upon putting a new or used meter into service in the state of Iowa, the user shall report to the weights and measures bureau. This rule is intended to implement Iowa Code section 215.20. [ARC 7129C, IAB 12/13/23, effective 1/17/24]
R.21—85.29 Advertisement of the price of liquid petroleum products for retail use
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85.29(1) Nothing in this rule shall be deemed to require that the price per gallon or liter or any grade or kind of liquid petroleum product sold on the station premises be displayed or advertised except on the liquid petroleum metering distribution pumps. 85.29(2) Petroleum prod…
R.21—85.3 to 85.9
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WEIGHTS AND SCALES
R.21—85.30 Gallonage determination for retail sales. The method of determining gallonage on
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gasoline or diesel motor vehicle fuel for retail sale shall be on a gross volume basis. Temperature correction or any deliberate methods of heating shall be prohibited. This rule is intended to implement Iowa Code sections 214A.3 and 215.18. [ARC 7129C, IAB 12/13/23, effective 1/…
R.21—85.31 Blender pumps. Motor fuel blender pumps or blender pumps installed or
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modified after November 1, 2008, that sell both ethanol blended gasoline classified as higher than E-15 and gasoline need to have at least two hoses per pump to separate registered gasoline fuels from flex fuels. This rule is intended to implement Iowa Code section 214A.2. [ARC 7…
R.21—85.32 to 85.39
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MOISTURE-MEASURING DEVICES
R.21—85.40 Testing devices. All moisture-measuring devices will be tested against a measuring
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device that will be furnished by the department, and all moisture-measuring devices will be inspected to determine whether they are in proper operational condition and supplied with the proper accessories. This rule is intended to implement Iowa Code section 215A.2. [ARC 7129C, I…
R.21—85.41 Rejecting devices. Moisture-measuring devices may be rejected for any of the following
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reasons: 85.41(1) The moisture-measuring device tested is found to be out of tolerance with the measuring device used by the department by one of the inspectors so assigned by more than 0.7 percent on grain moisture content. 85.41(2) The person does not have available the latest …
R.21—85.42 Specifications and standards for moisture-measuring devices. The specifications
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and tolerances for moisture-measuring devices are those established by the United States Department of Agriculture as of November 15, 1971, in chapter XII of GR instruction 916-6, equipment manual, used by the Federal Grain Inspection Service; and those recommended by the Nationa…
R.21—85.43 Testing high-moisture grain. When testing high-moisture grain, the operator of a
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moisture-measuring device shall use the following procedure: Test each sample six times, adding the six measurements thus obtained and dividing the total by six to obtain an average, which shall be deemed to be the moisture content of such sample. This rule is intended to impleme…
R.21—85.44 to 85.49
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TESTING AND ACCURACY
R.21—85.50 Electric vehicle charging stations
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85.50(1) The department will inspect licensed electric fuel dealers and users for accuracy and correctness from a list provided by the department of revenue. 85.50(2) The specifications and tolerances for electric fuel and charging stations shall be those as published in the NIST…
R.21—86.1 Definitions
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“Class 1 waiver” means an incompatible infrastructure class 1 waiver order. “Class 2 waiver” means an incompatible infrastructure class 2 waiver order. “Department” means the department of agriculture and land stewardship. “Motor fuel storage and dispensing infrastructure” means …
R.21—86.2 E-15 access standard—retail dealer compliance
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86.2(1) A retail dealer shall advertise for sale and sell E-15 gasoline pursuant to Iowa Code section 214A.32 as enacted by 2022 Iowa Acts, House File 2128, section 2, unless any of the following apply: a. The retail dealer has been granted an incompatible infrastructure class 1 …
R.21—86.3 Incompatible infrastructure waivers
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86.3(1) Class 1 waiver. A retail dealer may apply for a class 1 waiver from the E-15 access standard by submitting a completed application to the department. The retail dealer shall include supporting documentation with the application regarding the retail motor fuel site’s gasol…
R.21—86.4 Small retail motor fuel site exemption
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86.4(1) A retail dealer may apply for a small retail motor fuel site exemption from the E-15 access standard by submitting a completed application to the department. The retail dealer shall provide the department with the retail motor fuel site’s total gasoline gallonage for cale…
R.21—86.5 Terminable events
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86.5(1) A retail dealer shall notify the department when a terminable event is planned to occur, is occurring, or has occurred. Failure to notify the department may result in the termination of a class 1 waiver, class 2 waiver, or small retail motor fuel site exemption. The depar…
R.21—90.1 Definitions. For this chapter, the following definitions apply:
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“Bureau” means the grain warehouse bureau of the department of agriculture and land stewardship. “Generally accepted accounting principles” means accounting principles generally accepted in the United States of America, in accordance with the U.S. Financial Accounting Standards B…
R.21—90.10 Notice to the warehouse bureau
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90.10(1) The licensee shall notify the bureau prior to: a. Change of ownership of a warehouse. b. Change in name or business address of a warehouse or warehouse operator. c. The use of additional storage facilities that are not covered under the warehouse operator license. d. The…
R.21—90.11 Issuance of warehouse receipts. A warehouse receipt shall be issued no later than the
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close of the next business day following demand by the depositor or depositor’s agent. The original (white) warehouse receipt shall be given to the depositor upon demand. The depositor’s copy (green) shall be given to the depositor upon issuance of the warehouse receipt. The ware…
R.21—90.12 Cancellation of warehouse receipts. Upon delivery of the product represented by a
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warehouse receipt, the original receipt shall be marked “canceled,” signed or initialed, and dated upon the face thereof by the warehouse operator or an authorized agent. The warehouse operator shall then retain possession of the warehouse receipt in a separate numerical order of…
R.21—90.13 Lost or destroyed receipt. If a warehouse receipt is lost or destroyed, one of three
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methods shall be used in canceling the receipt. The following procedures shall be adhered to: 90.13(1) Depositor’s lost warehouse receipt release. If the depositor or warehouse receipt holder has lost the receipt and is either selling all of the grain to the warehouse operator or…
R.21—90.14 Warehouse receipts
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90.14(1) Warehouse receipt forms. Warehouse receipt forms shall be 8.5 inches wide by 7 inches long or 8.5 inches wide by 11 inches long and shall be printed in not less than triplicate. The original receipt shall be white, and the weight of the paper shall be 26-pound Defensa® p…
R.21—90.15 Tariffs. After being properly numbered and dated by the bureau, tariffs shall be returned
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to the licensee for posting in a conspicuous location. A copy of the tariff shall be posted in each location where grain is weighed and delivered. 90.15(1) Application of tariff. The tariff rates applicable to stored products shall be those as contained in the tariff on file with…
R.21—90.16 Records. A warehouse operator shall maintain complete and sufficient records to show
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all deposits, purchases, sales, storage obligations and loadouts of the warehouse. 90.16(1) Maintaining warehouse receipts. Unused warehouse receipts shall be maintained in numerical order. The warehouse operator’s copy (yellow) of outstanding warehouse receipts and the original …
R.21—90.17 Adjustment of records
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90.17(1) Adjustment of inventory for operational shrink. The department may require a licensee to take an operational shrink not to exceed .5 percent on grain received on a monthly basis. 90.17(2) Other inventory adjustments. Any reduction of record obligation shall be justified.…
R.21—90.18 Monthly grain statements. A grain statement shall be prepared at the close of business
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at the end of each calendar month and filed with the bureau by the tenth of the following month. This grain statement shall be on a form or in a format prescribed by the bureau. The bureau shall furnish forms to the warehouse operator upon request. A grain statement shall be file…
R.21—90.19 Grain stored in another warehouse. Upon approval by the bureau, a warehouse
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operator may store grain in another licensed warehouse. 90.19(1) Decision criteria. The department shall consider the following in deciding to approve or deny a warehouse operator’s request to store grain in another licensed warehouse: a. The other licensed warehouse is located i…
R.21—90.2 Types of products to be warehoused. Products to be warehoused shall be divided into
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two general types or classes as follows: 90.2(1) Bulk grain, which is grain that is not contained in sacks. 90.2(2) Agricultural and farm consumable products other than bulk grain. Such products include those suitable for storage in quantity, canned agricultural products and prod…
R.21—90.20 Warehouse operator’s obligation and storage. If, at the time of an examination, a
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shortage is determined, a warehouse operator shall purchase and make actual payment in the manner approved by the bureau for a sufficient quantity and quality of the commodity to fully cover the shortage by the end of the second business day after notice by the bureau, excluding …
R.21—90.21 Storing of products. Bulk grain in storage shall be stored in such a manner that the
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amount of grain in the storage facility can be readily determined. A product other than bulk grain shall be stored in such a manner that it can be readily inspected and the amount and kind thereof determined. The maintenance, conditioning, care, or surveillance shall be given to …
R.21—90.22 Facilities. No facility shall be considered suitable for the storage of bulk grain unless the
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warehouse has the necessary equipment such as grain leg, portable augers or vacuvators for handling, receiving, and loading out of grain. 90.22(1) No connection between facilities. No unlicensed facility shall be connected to a licensed facility unless prior approval is obtained …
R.21—90.23 Maintenance of storage facilities. All licensed storage facilities shall be maintained in
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such manner as to be suitable for the proper and safe storage of the particular product or products to be stored therein. Safe and adequate means of ingress and egress to the various storage units and grounds of the warehouse complex shall be provided and maintained by the wareho…
R.21—90.24 Temporary grain storage facilities. A temporary grain storage facility may, in the
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discretion of the department, be approved and licensed on the following bases: 90.24(1) License period. A license for a temporary storage facility may be issued at any time but shall be effective for the storage of grain only from August 1 to May 1 of the following year. A tempor…
R.21—90.25 Emergency ground pile storage space. Emergency ground pile storage space may, in
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the discretion of the department, be approved and licensed for the storage of corn on the following bases: 90.25(1) License period. A license for emergency ground pile storage space shall be effective from August 1 to January 31 of the following year. 90.25(2) Expiration. The war…
R.21—90.26 Polyethylene (polyvinyl) bag storage space. Polyvinyl bag storage space may, in the
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discretion of the department, be approved and licensed for the storage of corn on the following bases: 90.26(1) License period. A license for polyvinyl bag storage space shall be effective from August 1 to May 1 of the following year. A polyvinyl bag storage space license shall e…
R.21—90.27 Prioritization of inspections of warehouse operators. Warehouse operators with a
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probability of failure factor greater than 40 percent, as calculated by the statistical model, shall be examined at least twice in a 12-month period. [ARC 9455C, IAB 8/6/25, effective 7/10/25]
R.21—90.28 Department of agriculture and land stewardship enforcement procedures. The
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bureau shall follow a step-by-step enforcement policy to ensure consistent compliance with and application of this chapter. The department recognizes that violations of certain rules may have more serious ramifications; thus, the enforcement of those rules requires stricter polic…
R.21—90.3 Application for a warehouse operator license. The bureau may require the
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applicant to file updated information if the information on the application is no longer current. The application, insurance certificate, financial statement, tariff, license fee, indemnity fund fee and background information on a person applying for the license and on the manage…
R.21—90.4 Warehouse operator license. Separate class licenses bearing the same number may be
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issued to the same business entity authorizing the storage of bulk grain under one license and the storage of products other than bulk grain under the other license (Class 2 warehouse). The separate licenses may be for the same facilities provided the warehouse or warehouses desc…
R.21—90.5 Posting of license. The warehouse operator license certificate, including the warehouse
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diagram, shall be posted at all times in a conspicuous location in the place of business. A license certificate shall be posted in each location where grain is delivered or weighed. Upon receipt of an amended license, the warehouse operator shall immediately post the amended lice…
R.21—90.6 Renewal, expiration and reinstatement of license—payment of license fee
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90.6(1) Renewals. The bureau shall send to each licensed warehouse operator written notice that the application, the license fee and the indemnity fund fee for annual renewal of the warehouse operator license shall be received in accordance with Iowa Code section 203C.37. If the …