Section 40 ILCS 5/9-109 - "Present employee"(a) Any employee on the day before the effective date who becomes a contributor on the effective date; and(b) Any person who was an employee of the county or the Board of Trustees of the County Pension Fund on the day before the effective date who did not become a contributor on the effective date and who is in the employ of the county or the board on August 31, 1935 and who has made application on or before September 1, 1935 to the board to have the provisions of "The 1925 Act" apply to his former periods of service, and who (1) was not a contributor to the fund prior to September 1, 1935, or(2) became a contributor prior to September 1, 1935, and was employed by the county or board prior to the time he became a contributor;(c) Any person who (1) was an employee of the county or the Board of Trustees of the pension fund which the fund herein provided for supersedes, prior to the effective date but who was not in such employ on such date, and (2) returns to the service of the county or of the board subsequently and is an employee for 10 or more years, at least 6 of which were employment subsequent to such date; and(d) Any person elected by vote of the people to a county office prior to July 1, 1947, who on said date is serving in such elective office and who elects to become a contributor.