(3) Procedure. The procedure for making application for approval to compute gross income from mining by use of an alternative method, other than the proportionate profits method; the conditions for approval and use of an alternative method; changes in an approved method; and other pertinent information with respect thereto, will be published from time to time in the Cumulative Bulletin (see, for example, Rev. Proc. 74-43, 1974-2 C.B. 496).