The appellant or representative may request that the Board obtain an opinion under Rule 906 (§ 20.906 ). The request must be in writing. It will be granted upon a showing of good cause, such as the identification of a complex or controversial medical or legal issue involved in the appeal which warrants such an opinion.
38 C.F.R. §20.907
Authority: 38 U.S.C. 5107(a) , 7102(c) , 7104(c) , 7109