CFR /  Title 38  /  Part 21  /  Sec. 21.414 Revision of decision.

The revision of a decision on which an action is based issubject to the following regulations:

(a) Clear and unmistakable error, Sec. 3.105(a);

(b) Difference of opinion, Sec. 3.105(b);

(c) Character of discharge, Sec. 3.105(c);

(d) Severance of service-connection, Sec. 3.105(d);

(e) Reduction to less than compensable evaluation, Sec. 3.105(e). (See Sec. Sec. 21.48, 21.322, and 21.324) (Authority: 38 U.S.C. 5112)

Informing the Veteran