a law enforcement officer with credentials to serve as a poll watcher, as described in subparagraph (A) or (B) of subsection (b)(2). (d) Authority of members of public To observe testing of equipment In addition to the authority of individuals to observe procedures under subsections (b) and (c), any member of the public may observe the testing of election equipment by election officials prior to the date of the election. (e) Prohibiting limits on ability To view procedures An election official may not obstruct the ability of an individual who is authorized to observe an election procedure under this section to view the procedure as it is being carried out. (f) Prohibition against certain restrictions An election official may not require that an individual who observes election procedures under this section stays more than 3 feet away from the procedure as it is being carried out. 330. Requirements for voting by mail-in ballot (a) Short title This section may be cited as the American Confidence in Elections: District of Columbia Mail Balloting Reform Act . (b) Prohibiting transmission of unsolicited ballots The District of Columbia may not transmit an absentee or other mail-in ballot for a District of Columbia election to any individual who does not request the District of Columbia to transmit the ballot. (c) Signature verification (1) Inclusion of certificate with ballot The District of Columbia shall include with each absentee or other mail-in ballot transmitted for a District of Columbia election a certificate of transmission which may be signed by the individual for whom the ballot is transmitted. (2) Requiring verification for ballot to be counted Except as provided in subsection (d), the District of Columbia may not accept an absentee or other mail-in ballot for a District of Columbia election unless— (A) the individual for whom the ballot was transmitted— (i) signs and dates the certificate of transmission included with the ballot under paragraph (1)