28. The pensionable salary of an employee in any calendar year shall not be less than the basic salary to which the employee is entitled in that year, determined in accordance with the conditions of employment applicable and according to the last paragraph of section 25, with the exception of any lump sum paid subsequently as an increase or adjustment of the pensionable salary for that year.
2001, c. 31, s. 28; 2007, c. 43, s. 135; 2010, c. 11, s. 7.