A motor carrier required to display the identification marker and carry a registration card on its vehicles shall annually register every motor vehicle with the Department on registration forms provided by the Department and pay a fee of $2 for every vehicle registered. Identification markers and registration cards shall become valid on April 1 of each year and shall be valid through the next succeeding March 31, except that a registration card and identification marker issued prior to April 15, 1965, shall be valid through March 31, 1966.
61 Pa. Code § 313.4