§ 518. Election of coverage under article. a. Except as provided in
subdivision c hereof, a member of a public retirement system of the
state on June thirtieth, nineteen hundred seventy-six who is not subject
to the provisions of article eleven of this chapter may elect to become
subject to this article by submitting such election on or before June
first, nineteen hundred seventy-eight. An election hereunder shall be
made in the form and manner prescribed in rules and regulations
promulgated by the head of the retirement system to which such member
belongs at the time of election. Such election shall be irrevocable
thirty days after it is received by the system involved. Provided,
however, that an election may not be made by any employee who is not
employed by a participating employer, or who is employed by a
participating employer described in subdivision c of section five
hundred of this article.

b. Contributions made by a member prior to an election pursuant to
subdivision a of this section, together with any interest thereon
through the date of election, shall thereafter become subject to the
provisions of section five hundred seventeen of this article.

c. On and after the date on which this act shall take effect, no
member of a public retirement system of the state shall elect to become
subject to this article.