If, prior to use, sale, or other disposition, the lessee enhances the value of coal after the coal has been placed in marketable condition in accordance with § 1206.257(h) of this subpart, the lessee shall notify ONRR that such processing is occurring or will occur. The value of that production shall be determined as follows:
(a)
A value established for the feedstock coal in marketable condition by application of the provisions of § 1206.257(c)(2) (i-iv) of this subpart; or,
(b)
In the event that a value cannot be established in accordance with subsection (a), then the value of production will be determined in accordance with § 1206.257(c)(2)(v) of this subpart and the value shall be the lessee's gross proceeds accruing from the disposition of the enhanced product, reduced by ONRR-approved processing costs and procedures including a rate of return on investment equal to two times the Standard and Poor's BBB bond rate applicable under § 1206.259(b)(2)(v) of this subpart.