California Code
CHAPTER 5 - Weighing and Measuring Devices
Section 12503.

12503. Upon a written request of any resident of a county, there appearing reasonable ground therefor, the sealer shall test or cause to be tested, as soon thereafter as is practicable, the weights, measures, or weighing or measuring instruments used for commercial purposes by the person designated in that request.

(Amended by Stats. 1990, Ch. 338, Sec. 2.)