Except as provided in Section 87790, when any community college district employs an academic employee to perform instruction or other services in addition to his or her regular instructing duties, or when a district employs an academic employee to perform instructing or other services at a summer school maintained by the district, the district shall pay the employee for those services either in one lump sum or at an hourly, daily, biweekly, quadriweekly, or monthly rate of pay. If the pay is in one lump sum, the district shall pay the employee within 10 days after the termination of the services. If the pay is at an hourly, daily, biweekly, quadriweekly or monthly rate, the district shall pay the employee within 10 days after the end of each calendar month or pay period during which the services are performed.