Power to vary town planning scheme.

Notwithstanding anything contained in section 86, a town planning scheme may at any time be varied by a subsequent scheme made, 1[published by means of notice] and sanctioned in accordance with this Act : Provided that, when a scheme is so varied, the provisions of this Chapter shall so far as may be applicable, apply to such variation and making of subsequent scheme; and the date of the declaration of intention of the Planning Authority to vary the scheme shall, for the purposes of sections 69, 70, 97, 98 and 100, be deemed to be the date of declaration of intention to make a scheme referred to in those sections.