(1) The provisions of the Act specified in column 1 of Parts I and II of Schedule 1 to these Regulations shall be amended by substituting for the measurements set out opposite thereto in column 2 of that Schedule the measurements set out in the corresponding entry in column 3 of that Schedule; so however that the amendments set out in Part II of that Schedule shall not apply to shafts sunk, or as the case may be, lengths of road made, before these Regulations come into operation.
(2) The provisions of the Coal and Other Mines (Height of Travelling Roads) Regulations 1956 specified in column 1 of Schedule 2 to these Regulations shall be amended by substituting for the measurements set out opposite thereto in column 2 of that Schedule the measurements set out in the corresponding entry in column 3 of that Schedule; so however that the amendment set out in Part II of that Schedule shall not apply to any length of road made before these Regulations come into operation.
(3) The provisions of the Coal and Other Mines (Ventilation) Regulations 1956 , as amended , specified in column 1 of Schedule 3 to these Regulations shall be amended by substituting for the measurements set out opposite thereto in column 2 of that Schedule the measurements set out in the corresponding entry in column 3 of that Schedule; so however that the amendments set out in Part II of that Schedule shall not apply to stoppings constructed before these Regulations come into operation.
(4) The provisions of the Coal Mines (Clearances in Transport Roads) Regulations 1959 specified in Schedule 4 to these Regulations shall be amended by substituting for the measurements set out opposite thereto in column 2 of that Schedule the measurements set out in the corresponding entry in column 3 of that Schedule.
(5) Where under this Regulation a measurement is required to be substituted in any provision for a measurement which occurs more than once in that provision, the substitution shall be made in each place where it occurs.