(A) An employee of an employing agency may request voluntarily, in writing, that a specified number of hours of his accrued annual or sick leave or both be transferred from his annual or sick leave account to a pool account the agency establishes to distribute leave to leave recipients employed by the agency pursuant to this article, except that an employee with less than fifteen days in his sick leave account may not transfer any sick leave to the pool account, and an employee with more than fifteen days in his sick leave account may transfer sick leave to the pool account if he retains a minimum of fifteen days in his own sick leave account. An employee may donate no more than one-half of the annual or sick leave he earns within a calendar year to the appropriate pool leave account for that calendar year. Once leave of an employee has been transferred to the pool account, it may not be restored or returned to the leave donor.

(B) Under guidelines established by the Department of Administration, the employing agency may transfer all or any portion of the annual leave in the pool account to the annual leave account of the leave recipient, and all or any portion of the sick leave in the pool account to the sick leave account of the leave recipient.

(C) Annual or sick leave transferred under this section may be substituted retroactively for periods of leave without pay or used to liquidate an indebtedness for advanced annual or sick leave granted.