(a) Except during the period between the last session for the admission of electors prior to an election and the day following that election, the town clerk or assistant town clerk, during office hours and at the office of such official, may examine the qualifications of any person applying in person to be admitted as an elector and approve such application.

(b) Except during the period between the last session for the admission of electors prior to an election and the day following that election, either registrar of voters, or a deputy registrar or assistant registrar appointed in accordance with the provisions of § 9-192 may examine the qualifications of any person applying to be admitted as an elector in the town and, except for applications submitted pursuant to subdivision (4) of this subsection, approve such application submitted in person (1) at the office of such official; (2) at any enrollment session of the registrars of voters; (3) at any public place; (4) at any time and at any place in the town, other than a public place; or (5) at any public office of the Department of Motor Vehicles, Labor Department or Department of Social Services which is located in the town in which the registrar, deputy registrar or assistant registrar serves, if written notice of the date and time is given seven days in advance thereof to the commissioner of such department. Upon receipt of a written notice under subdivision (5) of this subsection, the commissioner of the department may designate a portion of the public office which shall be used for the admission of electors. The other registrar, or any deputy or assistant registrar, shall be permitted to be present during the admission of any person pursuant to subdivisions (4) and (5) of this subsection. Applications accepted and examined prior to the last session for admission of electors prior to an election pursuant to subdivision (4) of this subsection may be approved after such last session. The admission of any person pursuant to subdivision (4) shall be effective on the date when both registrars approve such application. The registrar who receives such application from the applicant shall give written notice to the other registrar within one business day after such receipt and the registrars shall forthwith act on such applications. No rejection of any application under subdivision (4) of this subsection shall be effective until the registrar has mailed to the other registrar and the applicant a notice stating any reason for the rejection. Any applicant whose application is rejected may appeal under the provisions of § 9-31l.

(c) Such registrar, deputy or assistant registrar accepting applications in accordance with subdivision (4) of subsection (b) of this section shall provide the applicant with a receipt. Upon approval or disapproval of the application, the registrars shall send a notice thereof by first-class mail with instructions on the envelope that it be returned if not deliverable at the address shown thereon. If such notice of approval is returned undeliverable, the registrars shall take the necessary action in accordance with § 9-35 or 9-43.

(d) During the period between the last session for the admission of electors prior to an election and the opening of the limited session for the admission of electors held on the last weekday before such election under § 9-17, the town clerk or assistant town clerk during office hours and at the office of such official and either registrar of voters or a deputy or assistant registrar at the office of such official may examine the qualifications of any person applying in person to be admitted in such town and approve the application of such person whose qualifications as to age, citizenship or residence in the municipality were attained after such last session and on or before the last weekday prior to such election.