No revenue from fees, duties, excises or license taxes relating to registration, operation or use of vehicles on public highways, or to fuels used for propelling such vehicles, shall be expended for other than cost of administration of laws providing for such revenue, making of refunds and adjustments in relation thereto, payment of highway obligations, or cost of construction, reconstruction, maintenance and repair of public highways and bridges and of the enforcement of state traffic laws; and such revenue shall be expended by the commonwealth or its counties, cities and towns for said highway purposes only and in such manner as the general court may direct; provided, that this amendment shall not apply to revenue from any excise tax imposed in lieu of local property taxes for the privilege of registering such vehicles. [Annulled by Amendments, Art. CIV.]