51 Pa. Stat. § 20124
Applications for compensation shall be made to the Adjutant General on forms and in the manner as he shall prescribe.
All applications shall be made (1) personally by the veteran, or (2) in case of death or mental incompetency or missing in action preventing the making of a personal application, then by such representative of the veteran as the Adjutant General shall by regulation prescribe. An application made by a representative other than one authorized by such regulation shall be void.
The Adjutant General shall not accept or consider any application filed or mailed after four years beyond the date which Congress establishes as the end of the period of service for which a person shall be eligible to receive the Vietnam Service Medal.
51 P.S. § 20124