1. Short title This Act may be cited as the Veterans Appeals Improvement and Modernization Act of 2017 . 2. Reform of rights and processes relating to appeals of decisions regarding claims for benefits under laws administered by Secretary of Veterans Affairs (a) Definitions Section 101 of title 38, United States Code, is amended by adding at the end the following new paragraphs: (34) The term agency of original jurisdiction means the activity which entered the original determination with regard to a claim for benefits under laws administered by the Secretary. (35) The term relevant evidence means evidence that tends to prove or disprove a matter in issue. (36) The term supplemental claim means a claim for benefits under laws administered by the Secretary filed by a claimant who had previously filed a claim for the same or similar benefits on the same or similar basis. . (b) Notice regarding claims Section 5103(a) of such title is amended— (1) in paragraph (1), in the first sentence, by striking The and inserting Except as provided in paragraph (3), the ; (2) in paragraph (2)(B)(i) by striking , a claim for reopening a prior decision on a claim, or a claim for an increase in benefits; and inserting or a supplemental claim; ; and (3) by adding at the end the following new paragraph: (3) The requirement to provide notice under paragraph (1) shall not apply with respect to a supplemental claim that is filed within the timeframe set forth in subparagraphs (B) and (D) of section 5110(a)(2) of this title. . (c) Modification of rule regarding disallowed claims Section 5103A(f) of such title is amended— (1) by striking reopen and inserting readjudicate ; and (2) by striking material and inserting relevant . (d) Modification of duty To assist claimants Section 5103A of such title is amended— (1) by redesignating subsections (e) through (g) as subsections (g) through (i), respectively