(a) An emergency leave donor may not contribute less than 1 hour or more than 104 hours of annual leave in a leave year to an emergency leave transfer program. Each agency may establish written criteria for waiving the 104-hour limitation on donating annual leave in a leave year.

(b) Annual leave donated to an emergency leave transfer program may not be applied against the limitations on the donation of annual leave under the voluntary leave transfer or leave bank programs established under 5 U.S.C. 6332 and 6362, respectively.