(a) Denial of a conscientious objector claim by a board must be accompanied by a statement specifying the reason(s) for such denial as prescribed in §§ 1633.9, 1651.4 and 1653.3 of this chapter. The reason(s) must, in turn, be supported by evidence in the registrant's file.

(b) If a board's denial is based on statements by the registrant or on a determination that the claim is inconsistent or insincere, this should be fully explained in the statement of reasons accompanying the denial.