38 CFR 20.503: Rule 503. Time limit for response to appeal by another contesting party in a simultaneously contested claim.

A party to a simultaneously contested claim may file a brief or argument in answer to a Substantive Appeal filed by another contesting party. Any such brief or argument must be filed with the agency of original jurisdiction within 30 days from the date the content of the Substantive Appeal is furnished as provided in § 19.102 of this chapter. Such content will be presumed to have been furnished on the date of the letter that accompanies the content.