; and (B) whether the action is warranted by the frequency or seriousness of the violation by the parolee of any other condition or conditions of parole. (e) Notice Not later than 21 days, excluding holidays, after a revocation hearing under this section, the Commission shall furnish the parolee with a written notice of its determination. If parole is revoked, a digest shall be prepared by the Commission setting forth in writing the factors considered and reasons for such action, a copy of which shall be given to the parolee. 3644. Reconsideration and appeal (a) In general If parole release is denied under section 3635, parole conditions are imposed or modified under section 3638, parole discharge is denied under section 3640(c), or parole is modified or revoked under section 3643, the individual to whom such decision applies may have the decision reconsidered by submitting a written application to the regional Commissioner not later than 30 days after the date on which the decision is rendered. (b) Review by regional Commissioner Not later than 30 days after receipt of an application under subsection (a), a regional Commissioner shall— (1) acting in accordance with rules and regulations, reaffirm, modify, or reverse the original decision; and (2) inform the applicant in writing of the decision and the reasons therefor. (c) Appeal to National Appeals Board (1) In general Any decision made under subsection (b) which is adverse to the applicant for reconsideration may be appealed by the individual to the National Appeals Board by submitting a written notice of appeal not later than 30 days following the date on which such decision is rendered. (2) Review In accordance with rules and regulations, the National Appeals Board— (A) not later than 60 days after receipt of an appellant's papers, shall reaffirm, modify, or reverse the decision