Section 5 in The Bombay Building for Industrial Undertakings (Control on Erection, Be-erection and Conversion) Rules, 1967
5.
To avoid further overcrowding of industries in the Bombay-Thana area as a broad policy, the establishment of new industries or the substantial expansion of the existing industries in the Bombay-Thana area shall not be permitted, except in respect of industries which are essential.
