; or (B) the individual will be unable to cast a ballot in the election in person because of a reasonable impediment, as determined in accordance with the law of the State involved. (2) Exception for absent military voters Paragraph (1) does not apply with respect to an individual who is an absent uniformed services voter, as defined in section 107(1) of the Uniformed and Overseas Absentee Voter Act ( 52 U.S.C. 20310(1) ), who is entitled to vote by absentee ballot under such Act. (b) Signature The appropriate election official may not accept a voted ballot transmitted by mail unless the ballot includes the voter’s signature and— (1) the signature on the ballot matches a signature of the voter under the records of the State; or (2) a witness observed the voter signing the ballot or the voter’s signature on the ballot is notarized. . (b) Conforming amendment relating to enforcement Section 401 of such Act ( 52 U.S.C. 21111 ) is amended by striking and 303 and inserting 303, and 304 . (c) Clerical amendment The table of contents of such Act is amended— (1) by redesignating the items relating to sections 304 and 305 as relating to sections 305 and 306; and (2) by inserting after the item relating to section 303 the following new item: Sec. 304. Conditions on provision and acceptance of ballots by mail. .