43 C.F.R. § 30.405
When may I initiate a purchase at probate?
(a) To initiate a purchase at probate during the initial probate proceeding, the eligible purchaser must submit the written request before the completion of the first probate hearing.
(b) If a property interest the eligible purchaser would like to purchase has been added to the decedent's estate under § 30.251, the purchaser must submit the written request within 30 days of the mailing of the distribution order issued under § 30.251(d).