Section 4.40-25 - Coast Guard marine casualty investigation for the Board(a) If the Board does not conduct an investigation under § 4.40-15 (a), (b) (2) or (3) , the Coast Guard, at the request of the Board, may conduct an investigation under the Act unless there is an allegation of Federal Government misfeasance or nonfeasance.(b) The Board will request the Coast Guard to conduct an investigation under paragraph (a) of this section within 48 hours of receiving notice under § 4.40-10(c) .(c) The Coast Guard will advise the Board within 24 hours of receipt of a request under paragraph (b) of this section whether the Coast Guard will conduct an investigation under the Act.CGD 82-034, 47 FR 45882, Oct. 14, 1982