(a) Unless the person is exempt from the license requirement, a person may not employ an individual who performs or offers to perform device maintenance activities unless the person holds a service company license issued by the department.(b) The department may issue a license to a person who:(1) has available annually certified test standards meeting the specifications in NIST Handbook 105 series, for each class of license as follows:(A) Class 1. Scales, capacity 300 pounds or less: One 30-pound test kit, and additional test weights capable of testing a scale to 100% of its capacity.(B) Class 2. Scales, capacity more than 300 pounds but not more than 3,000 pounds: One 30-pound test kit, and additional test weights equal to 300 pounds or 25% of the capacity of the scale being tested, whichever is more.(C) Class 3. Scales, capacity more than 3,000 pounds but not more than 40,000 pounds: Test weights equal to 1,000 pounds or 12.5% of the capacity of the scale being tested, whichever is more, and correction weights in sizes no larger than one-half the minimum graduation of any scale to be tested.(D) Class 4. Scales, capacity more than 40,000 pounds: Test weights equal to 10,000 pounds or 12.5% of the capacity of the scale being tested, whichever is more, and correction weights in sizes no larger than one-half the minimum graduation of any scale to be tested.(E) Class 7. Liquified petroleum gas (LPG) measuring devices: LPG prover.(2) has available the latest editions of NIST Handbook 44 and this chapter.