Conn. Agencies Regs. § 10-183aa(f)-1
Each person receiving a disability retirement allowance from the system during a calendar year shall by April 15, of the following year file with the board an annual income statement on a form approved by the board containing such details of the income of the disabled retiree for the calendar year as may be required or useful to insure compliance with the provisions of chapter 167a relating to disability retirement allowances. In addition, the board may require a disabled retiree to furnish copies of the retiree's federal income tax return for any year for which disability retirement allowances have been paid to the retiree. Payment of disability retirement allowances may be suspended for any retiree while the retiree is delinquent in filing an annual income statement or a required copy of the retiree's federal income tax return.
Conn. Agencies Regs. § 10-183aa(f)-1