Section 123.33 - Procedures for processing an Indian Tribe's application(a) The Regional Administrator shall process an application of an Indian Tribe submitted pursuant to § 123.32 in a timely manner. He shall promptly notify the Indian Tribe of receipt of the application.(b) The Regional Administrator shall follow the procedures described in 40 CFR part 123, subpart D in processing a Tribe's request to assume the NPDES program.58 FR 67982, Dec. 22, 1993, as amended at 59 FR 64343, Dec. 14, 1994