CHAPTER 3. Standards of Weights and Measures [12300. - 12314.]

Cal. Business and Professions Code - BPC 3.

in effect

Cal. Business and Professions Code - BPC § 12300. Section 12300.

Contracts made within this State for work to be done or for anything to be sold or delivered by weight or measure shall be construed according to the common standards, or according to the weights and measures of the metric system authorized by Congress, as the contract provides.

Cal. Business and Professions Code - BPC § 12301. Section 12301.

No contract or pleading is invalid or subject to objection because the weights or measures expressed or referred to therein are weights or measures of the metric system.

Cal. Business and Professions Code - BPC § 12303. Section 12303.

The state standards of weights and measures by which all state and county standards of weights and measures shall be tried, proved, and sealed include the following standards, provided the standards have been certified relative to national standards under the direction of the National Institute of Standards and Technology: (a) Metrological standards provided by the United States. (b) Metrological standards procured by the state. (c) Metrological standards in the possession of county sealers. (d) Metrological standards in the possession of laboratories certified to perform measurement services pursuant to Section 12314.

Cal. Business and Professions Code - BPC § 12304. Section 12304.

The department shall keep the standards of the state in a suitable laboratory location or, if transportable, shall maintain the standards under environmental conditions appropriate for maintaining the integrity of the unit of measure represented by the standard. The department shall have the standards directly certified by the National Institute of Standards and Technology or by any measurement assurance procedures approved by the National Institute of Standards and Technology.

Cal. Business and Professions Code - BPC § 12305. Section 12305.

The department shall use the standards of the state to certify similar standards and any dissimilar standards that are dependent on the values represented by the state standards. Copies of the standards that have been compared and certified against the state standards shall become working standards that shall be used in the certification, calibration, and sealing of county field standards, and in the certification, calibration, and sealing of measurement devices submitted by state and local government agencies or by industry.

Cal. Business and Professions Code - BPC § 12308. Section 12308.

The legislative body of each county shall, upon the appointment of a sealer provide copies of the State’s standards of weights and measures at county expense. These copies shall be verified and certified to by the department.

Cal. Business and Professions Code - BPC § 12309. Section 12309.

The department shall, at the request of the legislative body of any county, furnish copies of the standard weights and measures of the State at the expense of the county requesting them. It shall upon request of the legislative body of any county or upon the request of a sealer of any such county test and approve copies of the State’s standards of weights and measures procured by such county to be used by a county sealer. Copies furnished under the provisions of this section or copies tested and approved shall be true and correct; shall be sealed and certified to; and stamped with the letter “C.” Such copies need not be of the same material or construction as the standards of the State and such copies may be furnished in any suitable materials or construction that the county requiring the same may specify, subject to the approval of the department.

Cal. Business and Professions Code - BPC § 12310. Section 12310.

The department, or a laboratory designated by the department that has been certified pursuant to Section 12314, shall certify the standards of the county sealers as often as may be deemed by the secretary to be necessary, based upon a review of statistical data resulting from previous certifications, but in no event shall the period of time between certifications exceed 10 years. In the absence of statistical data, standards shall be certified at least every two years. Sealers shall, upon the request of the department, deliver for testing those standards in their possession that are used in the discharge of their duties. Direct expenses incurred in the certification process shall be borne by the state or recovered pursuant to Section 12241, while any incidental expense, such as the cost of transportation, shall be borne by the county whose standards have been certified.

Cal. Business and Professions Code - BPC § 12310.5. Section 12310.5.

The department shall, upon request, certify and verify the various types of standards of weights and measures used by industry in accordance with the standards certified by the National Institute of Standards and Technology, when such standards are submitted to the department for verification and certification. The department shall establish a schedule of fees sufficient to cover the cost of furnishing such services. All money received under the provisions of this section shall be paid into the State Treasury and credited to the Department of Agriculture Fund to be expended by the department for the administration of the provisions of this section.

Cal. Business and Professions Code - BPC § 12311. Section 12311.

Every sealer having knowledge that a county standard may be incorrect, regardless of the cause, shall notify the department of the condition, and shall, if deemed by the department to be necessary, arrange to have the standard in question retested, adjusted, or replaced.

Cal. Business and Professions Code - BPC § 12312. Section 12312.

In any prosecution for a violation of any of the provisions of this division any copy of the standards of weights and measures of the State furnished, procured, and certified to under the provisions of this division, shall be admitted in evidence upon the trial as prima facie true and correct.

Cal. Business and Professions Code - BPC § 12313. Section 12313.

The definitions of basic units of weight and measure, and the tables of weight and measure and weights and measures equivalents, as published by the National Institute of Standards and Technology are recognized and shall govern weighing and measuring equipment and transactions in this state.

Cal. Business and Professions Code - BPC § 12314. Section 12314.

The department, by regulation, may establish criteria and procedures for certification of laboratories to perform measurement services that are determined by the secretary to be beyond the existing equipment capabilities of the department, or when warranted by financial or workload considerations. The department shall recover actual costs for the certification of any laboratory from that laboratory. The secretary may revoke or suspend any certification issued pursuant to this section for good cause. The secretary shall establish by regulation criteria to be used when revoking or suspending any certification on the basis of good cause. Any proceeding to revoke or suspend any certification shall be conducted pursuant to Chapter 5 (commencing with Section 11500) of Part 1 of Division 3 of Title 2 of the Government Code, and the secretary shall have all the powers granted therein. Measurements performed and standards certified by laboratories certified under the provisions of this section shall qualify as prima facie evidence.

Source: CA Legislative Counsel Bulk DataURL: https://downloads.leginfo.legislature.ca.gov/pubinfo_2025.zipFetched: 6/27/2026