18.—Areas of Leases.

The extent of any lease granted under these Regulations shall be, except in special cases hereinafter provided for, on quartz lodes or veins, not less than one hundred (100) yards, nor more than four hundred (400) yards in length along the line of the lode, by a width of not less than fifty (50) yards, nor more than two hundred (200) yards measured across the lode; and in alluvial workings an area not exceeding ten (10) acres.