4. References to time of day. In this Act, references to time of day are references to Indian standard time, being five and a half hours ahead of Greenwich mean time: Provided that, for any area in which Indian standard time is not ordinarily observed, the Central Government may make rules--
(b) defining the local mean time ordinarily observed therein; and
(c) permitting such time to be observed in all or any of the mines situated in the area. CHAP INSPECTORS AND CERTIFYING SURGEONS CHAPTER II INSPECTORS AND CERTIFYING SURGEONS
chief Inspector and Inspectors.