Pursuant to M.G.L. c. 90, § 2 and § 31, 540 CMR 13.00 implements the provisions of the International Registration Plan which the Commonwealth joined as of January 1, 1994 and which has most recently been amended effective January 1, 2021 (the Plan). 540 CMR 13.00 applies to the registration of vehicles on a full or apportioned basis as defined under the Plan and M.G.L. c. 90, and to the operation of those vehicles on the ways of the Commonwealth. It shall be construed to advance the expressed fundamental principle of the Plan to promote freedom of vehicle movement to the fullest extent possible, consistent with the Plan and other laws of the Commonwealth
540 CMR, § 13.01