If the Commission determines under section 37L that invalidity service pension is payable to the person:
(a) the determination takes effect on the day on which the determination is made or on such later or earlier day as is specified in the determination; and
(b) subject to this Act, invalidity service pension is payable to the person at the rate specified in the determination.
Note: Invalidity service pension is not payable to a person who is receiving another service pension or a social security pension or benefit (see section 37C).