Section 33A(1) in The Coal Mines Provident Fund Scheme
(1)Every contribution payable under this Scheme during a period of currency commencing at any time on or after the 1st April, 1953, shall be paid monthly in respect of each colliery separately on or before the date specified in sub-paragraph (2). The contributions shall be calculated.][as provided in this Scheme] [The words 'on the basis of wages payable' substituted by S.R.O. 1472 dated 2nd July 1955.] for all wage periods ending in a month.