Where in any mine, it is intended to contruct a reservoir, dam or other structure to withstand a pressure of water, which will flow when wet or to control the in rush of water the manager, give in writing not less than . . . . . . . . days notice to the regional Inspector, accompanied by two copies of plan, showing design and other details of proper construction.

A. 7

B. 14

C. 21

D. 30

Answer: Option B