936                                        LAWS OF MARYLAND                                Ch. 459

(6)      Should any member in any period of six consecutive years after last
becoming a member be absent from service more than two years, or should he
withdraw all or part of his accumulated contributions, or should he become a
beneficiary or die, he shall thereupon cease to be a member; provided, however,
that any member who was absent from service for more than two years on account
of the transfer or lease to the United States of the facility or property where said
member was employed and who continued to work at the same place as an
employee of the United States until the return of the property to the State after
the war, when he again became an employee of the State, shall be entitled to credit
for all service as an employee of the State before he became an employee of the
United States as hereinbefore described and his prior service certificate shall again
become effective as if he had not ceased to be an employee of the State. However,
any such person who has withdrawn his accumulated contributions (other than one
who has become a beneficiary or died) may subsequently redeposit in the
retirement system the amount of accumulated contributions previously withdrawn,
with interest to the date of redeposit, and regain previous service credit with the
condition, however, that he may not retire within three years after the date of
reentry in the retirement system.

Any member who had terminated membership in the Teachers' Retirement
System or the State Police Retirement System may and upon deposit into the
Employees' Retirement System of the accumulated contributions previously
withdrawn from the Teachers' System or the State Police System, with interest to
date of deposit, receive credit in the Employees' System for the service that had
previously been terminated with the condition, however, that he may not retire
within three years after the date of entry in the Employees' Retirement System.

(7)    It shall be the duty of the head of each department to submit to the board
of trustees a statement showing the name, title, compensation, duties, date of birth,
and length of service of each member and such information regarding other
employees in his department as the board of trustees may require. The board of
trustees shall then place each member in one of the following groups:

Group 1. Clerical, administrative, professional and technical workers engaged in
duties requiring principally mental exertion.

Group 2. Laborers, mechanics and other workers engaged in duties requiring
principally physical exertion.

Any other group of not less than two hundred and fifty persons which may be
hereafter recommended by the actuary on the basis of service and mortality
experience and approved by the board of trustees, to cover all or part of any group
or groups previously created or any additional classes of employees.

9.

(7) Credit for previous membership; payment of contributions withdrawn.
Notwithstanding anything to the contrary in this article, every employee of the
State or of a participating municipal corporation, who is or becomes a member of
the Employees' Retirement System and who at any previous time since October 1,
1941, was an employee of the State or of one or more of the counties or municipal
corporations of this State, and whose previous employment by the State or county
or municipal corporation of this State was not terminated las) AT his own
volition, shall receive in the Employees' Retirement System service credit for the
time spent as a member of the Employees' Retirement System in such previous
employment so that he shall again be credited with all his creditable service as a
member of the Employees' Retirement System, including prior service credit to
which he was entitled during the previous employment. Upon receiving a claim for