Section 157. Deductions from retirement allowances

A person who (1) retired
  from  employment with the state, (2) is receiving a retirement allowance
  from a state retirement system, and (3) at the time  of  his  retirement
  had  group  life  insurance  premiums  and  employee  organization  dues
  deducted from his salary, may elect to have deductions for such purposes
  made from his retirement allowance by providing notification in  writing
  to  the  head  of the retirement system from which he retired. Such life
  insurance deduction shall be transmitted to the insurance carrier.  Such
  dues  deduction  shall  be transmitted to the employee organization. Any
  such written authorization may be withdrawn by such retired employee  at
  any  time  upon  written  notice  of  such withdrawal to the head of the
  retirement system from which he retired.