§ 553. Additional pension benefit for members of optional twenty year
retirement plan. a. A participating employer which has elected, or
which elects to provide the benefits of the optional twenty year
retirement plan for its employees as specified in section five hundred
fifty-two of this article may elect to make contributions for the
purpose of providing an additional pension pursuant to this section for
members in its employ who are entitled to a pension pursuant to section
five hundred fifty-two of this article. Every member employed by an
employer which participates in the retirement system and which has
elected the provisions of section five hundred fifty-two of this article
and this section may elect to be covered by the provisions of this
section by filing with the comptroller a duly executed and acknowledged
form prepared by the comptroller for that purpose.

b. Upon retirement, each such member shall receive, for each year of
service in excess of twenty, an additional pension which shall be equal
to one-sixtieth of his or her final average salary; provided, however, a
participating employer may elect to provide any service credit earned
with a public employer prior to services performed as a sheriff,
undersheriff or deputy sheriff towards the one-sixtieth allowance and
provided further that the total allowance payable pursuant to this
section shall not exceed three-quarters of such member's final average
salary. The additional benefit provided by this subdivision shall be
available to a member after his or her employer elects to make this
benefit available to all its members otherwise eligible to receive this
benefit.