The board of education of any school district may by resolution provide for the retirement on pension of a secretary of the board of education who has served in such office for 30 or more years on a part-time basis and 10 or more years on a full-time basis, who is not less than 65 years of age and who, by reason of age at the time of his appointment as a full-time secretary of the board, was ineligible for membership in a contributory pension system.
Any pension authorized pursuant to this act may not exceed 50% of the employee's annual final average salary, inclusive of any benefits to which the employee may be entitled under the General Non-Contributory Pension Act, or any other pension payable from his employer and exclusive of any benefits to which the employee might be entitled under Federal Old Age and Survivor's Insurance.