29. The pensionable salary of an employee who simultaneously holds more than one pensionable employment in a year is the aggregate of the salary paid to the employee for each employment if the total service credited to the employee in respect of such employments is less than or equal to one year.
If the total service credited in respect of the pensionable employments of the employee is reduced for the purposes of section 32, the pensionable salary of the employee shall be equal to the total of the following amounts :
(1) the pensionable salary attached to each employment in respect of which service is credited in full ; and
(2) the pensionable salary attached to the employment in respect of which service is credited in part, multiplied by the service credited in respect of that employment over the service accumulated in such employment.