38 CFR §20.907
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
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.