127. For the purposes of calculating a disability pension, the contributory period of a contributor is the period commencing on his eighteenth birthday, or 1 January 1966 if such contributor has reached 18 years of age before such date, and ending with the month preceding that in which a disability pension became payable to him under this Act or under a similar plan.
Nevertheless, such period does not include any month for which a disability pension was so payable to him.
Furthermore, such period does not include any month for which a family allowance was payable to such contributor, if included in a year for which his unadjusted pensionable earnings did not exceed his personal exemption for the year.
The third paragraph applies only in determining the contributory period of a contributor in respect of whom an application for a disability pension is made after 31 December 1976.
1965 (1st sess.), c. 24, s. 138; 1974, c. 16, s. 22; 1977, c. 24, s. 7.