If a person is registered under this chapter, registration shall expire 3 years from the date the registration card is issued. If, as a condition of registration in accordance with § 6.4(b)(5) (relating to registration procedure), the registrant was required to submit a copy of the current verification from the State Metrology Laboratory that the field standards used by that person are accurate, registration shall expire as of the expiration of that verification. Registration may be renewed by following the registration procedure in § 6.4.
70 Pa. Code § 6.7
This section cited in 70 Pa. Code § 6.5 (relating to registration card).