450 ARTICLE 77.

(b) The proportion so computed for a member age 59 shall be applied
to a member who attains a greater age before he becomes a member of the
retirement system. The Board of Trustees shall certify to the Superin-
tendent of 'Schools of each county, and the Superintendent of Schools of
each county shall cause to be deducted from the salary of each member on
each and every payroll of such county, for each and every payroll period
the proportion of earnable compensation of each member so computed. But
the Superintendent of Schools of any county shall not have any deduction
made for annuity purposes from the compensation of a member who elects
not to contribute if he has attained age 60 and has completed thirty-five
years of service. In determining the amount earnable by a member in a
payroll period, the Board of Trustees may consider the rate of annual
compensation payable to such member on the first day of the payroll period
as continuing throughout such payroll period, and it may omit deduction
from compensation for any period less than a full payroll period if a
teacher was not a member on the first day of the payroll period, and to
facilitate the making of deductions it may modify the deduction required
of any member by such an amount as shall not exceed one-tenth of one per
centum of the annual compensation upon the basis of which such deduction
is to be made.

(c) The deductions provided for herein shall be made notwithstanding
that the minimum compensation provided for by law for any member shall
be reduced thereby. Every member shall be deemed to consent and agree
to the deductions made and provided for herein and shall receipt for his
full salary or compensation, and payment of salary or compensation less
said deduction shall be a full and complete discharge and acquittance of all
claims and demands whatsoever for the services rendered by such person
during the period covered by such payment, except as to the benefits pro-
vided under this sub-title. The Superintendent of Schools of each county
shall certify to the Board of Trustees on each and every payroll or in such
other manner as the Board of Trustees may prescribe, the amounts to be
deducted; and each of said amounts shall be deducted, and when deducted
shall be paid into said Annuity Savings Fund, and shall be credited, to-
gether with regular interest thereon to the individual account of the mem-
ber from whose compensation said deduction was made.

(d) In addition to the contributions deducted from compensation as
hereinbefore provided, subject to the approval of the Board of Trustees,
any member may redeposit in the Annuity Savings Fund by a single pay-
ment or by an increased rate of contribution an amount equal to the total
amount which he previously withdrew therefrom as provided in this sub-
title, or any part thereof; or any member may deposit therein by a single
payment or by an increased rate of contribution an amount computed to be
sufficient to purchase an additional annuity, which, together with his pros-
pective retirement allowance, will provide for him a total retirement allow-
ance of not to exceed one-half of his average final compensation at age 60.
Such additional amounts so deposited shall become a part of his accumu-
lated contributions except in the case of disability retirement, when they