§ 651. Reduction of retirement age. a. A member described in section
six hundred fifty of this article may, subject to the provisions of
subdivision b of this section (and notwithstanding the provisions for
benefit reduction contained in subdivision a of section four hundred
forty-two and subdivision c of section five hundred four of this
chapter), retire without reduction of his or her service retirement
benefit prior to the attainment of the normal retirement age in
accordance with the following schedule:

(i) For each full year of covered employment occurring prior to
January first, nineteen hundred seventy-one, his or her normal
retirement age shall be reduced by six months; and

(ii) For each full year of covered employment occurring prior to
January first, two thousand nine which is subsequent to December
thirty-first, nineteen hundred seventy, his or her normal retirement age
shall be reduced by four months.

b. Provided however, that nothing herein:

(i) Shall permit a member of Tier one to retire, other than for
disability, prior to the attainment of age fifty, or a member of Tier
two, three or four to retire, other than for disability, prior to the
attainment of age fifty-five; and

(ii) Shall be construed to affect any other condition or requirement
of any general, special or local law.