Refer to FAQ response on compensation.
In most cases the UW allows donated leave to be charged to a sponsored Award. UW policy allows shared leave and consistently charges it to the budget(s) from which the leave donor is being paid at the time of the donation, regardless of the funding source. However, some caution and judgement is required to ensure that the charge for the shared leave is reasonable and does not impact the ability to complete the requirements of the Award. If there is an impact to the scope or objectives of the Award, then sponsor approval would be required.