Conn. Agencies Regs. § 45-29j-4
If a retirement allowance becomes payable either to the member or to the spouse, the payment to the beneficiary provided for in section 45-29m and 45-266 of the 1969 supplement to the general statutes shall be made only after the death of the survivor of the member and his spouse, and shall then be made in an amount equal to the excess, if any, of the member's contributions to the retirement fund over the aggregate of the retirement allowance payments made to him and to his spouse. The spouse shall have no right to name or change a beneficiary either before or after the death of the member. If no named beneficiary survives the member and his spouse, payments shall be made to the executor or administrator or the member, except that, if the amount is less than one thousand dollars, the refund may, at the option of the comptroller, be made in accordance with the terms of section 45-266 of the 1969 supplement to the general statutes.
Conn. Agencies Regs. § 45-29j-4