30 Pa. C.S. § 5308
Registrations issued under this subchapter to owners and dealers shall be valid from April 1 of one year to March 31 of the succeeding year and shall be renewable. A registration for any year shall be valid and may properly be displayed prior to April 1 within that year. The commission may determine to issue registrations valid for a period not to exceed three years upon payment of a fee equal to the annual registration fee times the number of years for which the multiple-year registration is valid. A multiple-year registration shall be valid from April 1 of the year of its issuance until March 31 of the last year of its validity, but a multiple-year registration issued prior to April 1 of any year is valid and may be displayed at any time within that year. The commission may, by regulation, provide for the transfer of multiple-year registrations upon the sale or conveyance of a boat upon payment of the fee provided in section 5104(8) (relating to fees).
30 Pa.C.S. § 5308