Requirement to return to work after a leave. Employees are required to return to the College upon completion of leave for a period equal to that for which assistance was given. When employees return they will be placed in a salary level at least equivalent to that held prior to going on leave. Employees who elect not to return to the College after completing their period of assisted leave will be required to refund to the PD Fund that portion of their regular salary which they have received from the PD Fund during the period of assisted leave. This refund payment may be waived by the mutual agreement of the Association and the College. An employee will be deemed to have returned to the College, for purposes of this clause only, if they are unable to return to the workplace as the result of an illness or injury.