Royalties will be required as follows, subject to the approval of the President, in accordance with the act of June 28, 1906 (34 Stat. 543):
For zinc-$50
For lead-$65
but in no case shall the rate of royalty be less than 5 percent or more than 20 percent. The percentage of recovery shall be computed as nearly as practicable upon the ore included in each sale, but where it is impracticable so to do the officer in charge and the lessee shall agree upon some other method of computation which will produce substantially the same result: Provided, That in case of their disagreement the Commissioner of Indian Affairs shall prescribe a rule of computation to be followed in such cases.
Note: The royalty would always be determined under this rule by ascertaining the percentage of recovery were it not for two things: (1) the flat rates which are fixed as the minimum and the maximum rates of royalty and (2) variations in the selling price of the ores. Concrete examples coming under the rule are set forth in the following table:
Zinc
[Where the base or standard is $50 per ton]
Percentage of recovery | Selling price | Royalty (percent) |
7 | $48 | 7 |
14 | 49 | 14 |
12 | 50 | 12 |
15 | 60 | 16 |
30 | 60 | 20 |
9 | 70 | 11 |
A similar table might be constructed for royalties on lead, but in so doing it would be necessary to bear in mind that the base or standard selling price for the lead is to be $65 instead of $50.
25 C.F.R. §214.10