43 C.F.R. § 4.1131 Time for discovery.
Title 43 - Public Lands: Interior
Following the initiation of a proceeding, the parties may initiate discovery at any time as long as it does not interfere with the conduct of the hearing.
Title 43: Public Lands: Interior
PART 4—DEPARTMENT HEARINGS AND APPEALS PROCEDURES
Subpart L—Special Rules Applicable to Surface Coal Mining Hearings and Appeals
Discovery
§ 4.1131 Time for discovery.

