4. One year of service shall be credited, for pension purposes, to every public officer or employee holding office full time for an entire calendar year who receives his full salary for that year.
A fraction of a year of service shall be credited:(a) to a public officer or employee who does not receive his full salary for the year; or
(b) to a part-time or seasonal employee.
The fraction contemplated in subparagraph a of the second paragraph is equal to the ratio between the number of remunerated days of work of that employee and the number of remunerated days of work he would have had during a full calendar year.
The fraction contemplated in subparagraph b of the second paragraph is equal to the ratio between the numerical equivalent of the remunerated full days of work of that employee and the number of remunerated full days of work during a calendar year of a full-time employee holding a similar employment.
The service contemplated by this section is credited only if the contributions have been deducted or paid.
In no case shall more than one year of service be credited during the same calendar year.
1973, c. 12, s. 147; 1974, c. 10, s. 1.