; and (B) by amending subsection (b) to read as follows: (b) (1) (A) Except in the case of simultaneously contested claims, notice of disagreement shall be filed within 1 year from the date of the mailing of notice of the decision of the agency of original jurisdiction pursuant to section 5104, 5104B, or 5108 of this title. (B) A notice of disagreement postmarked before the expiration of the 1-year period shall be accepted as timely filed. (C) A question as to timeliness or adequacy of the notice of disagreement shall be decided by the Board. (2) (A) Notices of disagreement shall be in writing, shall identify the specific determination with which the claimant disagrees, and may be filed by the claimant, the claimant's legal guardian, or such accredited representative, attorney, or authorized agent as may be selected by the claimant or legal guardian. (B) Not more than one recognized organization, attorney, or agent may be recognized at any one time in the prosecution of a claim. (C) Notices of disagreement shall be filed with the Board. (3) The notice of disagreement shall indicate whether the claimant requests— (A) a hearing before the Board, which shall include an opportunity to submit evidence in accordance with section 7113(b) of this title; (B) an opportunity to submit additional evidence without a hearing before the Board, which shall include an opportunity to submit evidence in accordance with section 7113(c) of this title; or (C) a review by the Board without a hearing or the submittal of additional evidence. (4) The Secretary may develop a policy to permit a claimant to modify the information identified in the notice of disagreement after the notice of disagreement has been filed under this section pursuant to such requirements as the Secretary may prescribe.