(a) If the Board obtains a legal or medical opinion. If the Board requests an opinion pursuant to Rule 901 (§ 20.901 of this part), the Board will notify the appellant and his or her representative, if any. When the Board receives the opinion, it will furnish a copy of the opinion to the appellant, subject to the limitations provided in 38 U.S.C. 5701(b)(1), and to the appellant's representative, if any. A period of 60 days from the date the Board furnishes a copy of the opinion will be allowed for response, which may include the submission of relevant evidence or argument. The date the Board furnishes a copy will be presumed to be the same as the date of the letter or memorandum that accompanies the copy of the opinion for purposes of determining whether a response was timely filed.
(b) If the Board supplements the record with a recognized medical treatise - (1) General. If, pursuant to § 19.9(d)(5) of this chapter, the Board supplements the record with a recognized medical treatise, the Board will notify the appellant and his or her representative, if any, that the Board will consider such recognized medical treatise in the adjudication of the appeal. The notice from the Board will contain a copy of the relevant portions of the recognized medical treatise. The appellant will be given 60 days after the date of the notice described in this section to file a response, which may include the submission of relevant evidence or argument. The date the Board gives the notice will be presumed to be the same as the date of the notice letter for purposes of determining whether a response was timely filed.
(2) Exception. The notice described in paragraph (b)(1) of this section is not required if the Board uses a recognized medical treatise or medical dictionary for the limited purpose of defining a medical term and that definition is not material to the Board's disposition of the appeal.