(1) The highway authority may,with the previousapproval of the State GOVernment, determine abuilding line and aeontiol line in respect of any highway or part of ahighway in its charge along one or both sides of the highway.
(2) The distance between the middle of a highway and the building line or that betw<en the building line and the control line, which shall be fixed with due regard to the requirements of safety and convenience i'or traffic and of publichealth welfare, may vary in different portions of the highway according to local conditions.
(3) When ahighway ax'thority rroposes to determine abuilding and a control line in reSpect e1 ahighway, the same procedure shall as far as applicable 1e foiIOWed as prescribed under sub-sections
(3) to (7) of section 11 for the prescription of standard width.
(4) The building and control lines as finally determined shall be demaicated on the ground by distinctive stones or other suitable marks which may be painted with ditTerent colours and serially numbered.