6. When the Government decides to build a new highway or to rebuild an old one, it may:(1) Fix, for each municipality crossed by the said highway, its share for each kilometre or part of a kilometre built or rebuilt within its limits, and payable after the completion of the work, provided such shares has been determined by resolution of the municipality, and such resolution may not thereafter be changed, except with the consent of the Government;
(2) Approve any agreement that may be made, by way of resolution, by the council of any municipality, with the Minister of Transport, for the construction of the portion of the highway crossing such municipality.