30. The amount of a pension in payment on 9 December 1975 or the payment of which begins after such date shall not be reduced subsequently in respect of any change in the benefits paid under a prescribed public pension plan.
The same rule applies in respect of the amount of any other benefit in payment under a supplemental plan on 22 December 1978, or the payment of which begins after that date.
1975, c. 18, s. 9; 1978, c. 69, s. 4.