The Teachers' Pension Plans Act does not allow for a change to the pension option once pension payments have started.
If you have chosen a Joint and Survivor pension option, it means that your nominee is your spouse/pension partner at the time you started your pension. You cannot change your nominee regardless of circumstance, even in the case of a change of marital status.
If you have chosen a Single Life pension with a guarantee period of five, 10 or 15 years, you may change your beneficiary at any time until the guarantee period expires.
Remember that an ATRF pension is always payable for the lifetime of the retired member.