Buildings and control lines along National Highways and levy of betterment of charges.

For the avoidance of doubt, it is hereby declared that nothing in this Act shall apply to highways which are or have been declared by or under any law made by Parliament to be national highways:

Provided that if any highway is declared to be a national highway under the National Highways Act, 1956, (Central Act 48 of 1956) it shall be lawful for the Government with the prior approval of the Central Government, to fix the building and control lines for different portions of the said highway under section 7 or to levy betterment charges under section 42 on lands the value of which has increased by reason of the construction or proposed construction of such highway and thereafter the provisions of this Act in so far as they apply to the restrictions on buildings between the highway boundary and the building line or between the building line and the control line and other provisions relating to such building and control lines or as the case may be, the provisions of this Act relating to the levy of betterment charges, shall, mutatis mutandis, apply.