To determine the normal working days for a position under paragraph (a) of this subsection, the employer shall determine the required number of working days for the position on a full-time basis and the equivalent number of hours representing the full-time position. The retiree then may work up to one-half (1/2) of the required number of working days or up to one-half (1/2) of the equivalent number of hours and receive up to one-half (1/2) of the salary for the position. In the case of employment with multiple employers, the limitation shall equal one-half (1/2) of the number of days or hours for a single full-time position.
Notice shall be given in writing to the executive director, setting forth the facts upon which the employment is being made, and the notice shall be given within five (5) days from the date of employment and also from the date of termination of the employment.