4003.21—Form and contents of initial determinations.
All determinations to which this subpart applies shall be in writing, shall state the reason for the determination, and, except when effective on the date of issuance as provided in § 4003.22(b), shall contain notice of the right to request review of the determination pursuant to subpart C or subpart D of this part, as applicable, and a brief description of the procedures for requesting review.