(d) Option I. Any person who, after twenty or more years' service as a county employe resigns from his or her office position or employment before reaching the age of sixty years when he or she attains the age of sixty years, when such former county employe shall be eligible to receive a retirement allowance which shall be computed on the average monthly compensation as received by the former county employe prior to his or her separation from the service of the county or county institution district in accordance with the provisions of subsection (a) of section 1712. Such former county employe shall be eligible to receive, in addition to a retirement allowance, a service increment, if any, in accordance with the provisions of subsection (b) of section 1712 only to the time of his or her separation from the service of the county or county institution district. Option II. Employe may elect to receive immediate retirement allowance benefits under the age of sixty years provided that said retirement allowance be reduced by one-half of one per centum for each month under the age of sixty years. Option I or Option II election shall be final upon separation of his or her service from the county.
Option III. Any employe under sixty years of age who has served twenty years or more and who was dismissed through no fault of his own may elect to receive immediate retirement allowance benefits plus a service increment, if any, equal to seventy per centum of the benefits he would be entitled to receive had he continued to be employed until age sixty. The service increment shall be effective as of January 1, 1989.