This chapter applies equally to the exploration and leasing of tide and submerged lands for the production of sulphur, save and except that the royalty for sulphur produced under this chapter shall not be less than $1.00 per long ton.

7 Del. C. 1953, § ?6435; 55 Del. Laws, c. 442, § ?1; 59 Del. Laws, c. 212, § ?1; 65 Del. Laws, c. 508, § ?1;