43 CFR §4.20

1. (a)Purpose. The purpose of this subpart is to establish general rules of practice, where appropriate.
2. (b)Scope. General rules applicable to proceedings before OHA are set forth in subparts A and B of this part. Rules applicable to particular units or a particular type of proceeding are set forth in other subparts of this part. Wherever there is any conflict between one of the general rules in subparts A or B of this part and a rule in another subpart of this part, the specific rule will govern. Other laws, regulations, and policies of the Department may also address and be applicable to a particular type of proceeding. In addition, part 1 of this subtitle, which regulates practice before the Department of the Interior, applies to proceedings before OHA.