25 C.F.R. § 1000.2330
(b) Every summary of an informal conference must contain the following language:
Within 30 days of the receipt of the summary from the informal conference, you may file an appeal of the initial decision of the Department of the Interior agency in accordance with subpart R of 25 CFR part 1000. Alternatively, you may file an action in Federal court pursuant to 25 U.S.C. 5331.