(1) All service agents and servicepersons shall use standards of adequate quantity and design to place commercial weighing and measuring devices in service.

(2) Submission of standards for inspection. All standards used for servicing, repairing and/or calibrating commercial weighing and measuring devices must be submitted at least every two years for examination and certification. The standards will be submitted to the state's metrology laboratory or a laboratory of any state in which a reciprocity agreement has been entered. The state metrology laboratory examines and certifies standards using the current version of National Institute of Standards and Technology Handbook 105.

(3) Recognition of out-of-state certification of any standard that has been inspected and examined by any state or agency in which the director has entered a reciprocity agreement will be considered correct if said examination is within the previous two-year period. Proof of inspection must be submitted to the department with the registration application.

(4) Proof of certification shall be maintained by the owner of the standards and be kept with the standards during normal usage for the purpose of inspection by the director or authorized representative.