Be it enacted by the Senate and House of Representatives
in General Court assembled, and by the authority of the same,
Section 8 of chapter 90 of the General Laws, as appearing in the 1984 Official Edition, is hereby amended by striking out the fifth paragraph and inserting in place thereof the following paragraph:-
A person to whom a license has been issued under this section shall not operate motor vehicles other than those for which such license has been made valid by the registrar. All operators of motor vehicles and trailers which are regarded as registered under a general distinguishing number or mark as provided in section five and motor vehicles and trailers owned and operated by the commonwealth or any of its political subdivisions shall be subject to the rules and regulations establishing classifications for operator's licenses. In absence of a registered gross weight for such vehicle or trailer, the gross vehicle weight rating as established by the original manufacture of the chassis shall be used to determine the class of license required to operate the aforementioned motor vehicles and trailers.