Section 5-310 - Enrollment; forms of affidavits, mailing requirements1. The board shall prepare forms for the various applications and affidavits required under this title and, upon application, shall furnish a copy of the appropriate form to or for any voter desiring to use the same, and an additional copy if required. Copies also may be sold by the board, at cost, to any qualified voter.2. Except when a voter is expressly required to file a paper in person, such paper may be filed either in person, by agent or sent by mail. Mailing within the state and within the times prescribed for filing shall be sufficient if the affidavit be received by the board. The postmark shall be sufficient proof of the date of mailing. If mailed outside of the state or if the postmark is omitted or illegible the affidavit must be received by the board within the times so prescribed for filing.