Commencement of working.
17. The lessee of a mining lease shall within twelve months of date of granting of such lease, or within such further time as the Governor by writing under his hand may grant, commence mining operations upon the lands subject to his said lease.
Mines to be effectually worked.
18. The lessee of a mining lease will at all times during the continuance thereof, except during the first twelve months, and unless prevented by any disturbances, or by unavoidable accident, effectually and vigorously work and develop and carry on mining operations on the land subject to the said lease.
Conditions of adequate working.
19. No mine shall be considered to be effectually or properly worked within the meaning of the preceding regulation unless it can be shown that an expenditure per annum has been incurred in respect of working on the ground of at least £2 per acre in the case of an alluvial, and £100 per claim in the case of a lode mining, lease.
Concentrated working.
Provided that in the case of contiguous leases held by the same person or corporation, the Governor may, on cause being shown, allow any two or more of the said leases to be regarded as one for the purpose of calculating the expenditure required by this regulation.
Deposit of tailings and waste matter.
20. In any case where tailings or any other products whatever from the operations of mining or metallurgy are being discharged, or about to be discharged, in such a manner as to hinder or injuriously affect any other person in the execution of his legal mining rights, or the future development of mining, it shall be lawful for the Government Inspector of Mines to order the disposal of such products or tailings in some other manner not detrimental to present or future mining.