An appointing authority may reassign any employee within the appointing authority's jurisdiction to another position of equal grade and service for which the employee meets the minimum qualifications within the appointing authority's jurisdiction. Except as otherwise required by law, no employee may be reassigned from one principal unit to another without the employee's consent, unless the Secretary certifies that the reassignment is in the best interests of the State. An employee may apply for a transfer to any vacant position of the same grade in any unit of the Executive Branch for which the employee meets the minimum qualifications. An employee who applies for a transfer to a position will be considered for the position along with other eligible applicants. Unless exigent circumstances exist, the appointing authority shall give an employee notice of a proposed reassignment at least 2 weeks before the effective date of the reassignment. An employee may agree to waive the required notice period. An employee may apply for a voluntary demotion to any vacant position of a lower grade in any unit in the Executive Branch for which the employee meets the minimum qualifications. An employee who applies for a voluntary demotion to a position will be considered for the position along with other eligible applicants.