Section 4. In section 30 of the principal Act,

14. In section 30 of the principal Act,— (i) to sub-section (1), the following proviso shall be added, namely:— "Provided that, subject to the previous approval of the Chief Inspector, the daily maximum hours specified in this sub-section may be exceeded in order to facilitate the change of shifts."; Amendment of section 24. 464 Mines (Amendment) [ACT 62 (ii) for the proviso to sub-section (2), the following proviso shall be substituted, namely:— "Provided that the Chief Inspector may, for reasons to be recorded in writing and subject to such conditions as he may deem fit to impose, permit the spread-over to extend over a period not exceeding fourteen hours in any day."; and (iii) for sub-section (3), the following sub-section shall be substituted, namely:— "(3) Persons belonging to two or more shifts shall not be allowed to do work of the same kind above ground at the same time: Provided that, for the purposes of this sub-section, persons shall not be deemed to belong to separate shifts by reason only of the fact that they receive their intervals for rest at different times."