A person who holds a valid license issued under the act of July 19, 1935 (P.L. 1356, No. 427), referred to as the Solid Fuel Weight Regulation Law, or the act of April 28, 1961 (P.L. 135, No. 64), known as the Public Weighmaster's Act, immediately prior to the effective date of this subchapter shall, on the effective date of this subchapter, be deemed licensed by the department under this subchapter, and existing licenses shall continue to be valid until their respective expiration dates, unless sooner suspended or revoked.
3 Pa.C.S. § 4169