Overtime to Comp time - how to restrict the combined total of comp time value to 72 hours

Summary:

Hi Experts,

We have two Compensatory time plans in Absence. Employees will convert the overtime to comp time by selecting respective time types while adding the time cards. They will convert the overtime after 40 hours of work minimum weekly. Based on the overtime calculations we had to create to compensatory plans. Now the requirement is, we have to restrict the comp time to 72 hours only (the combined total value of these two time types/two comp plans). Cany anyone guide us how to achieve this requirement without FF. If it is only achieved by