The civilian employees of the Department of Defense, including the civilian employees of the military departments and the Defense Agencies, who perform, or are involved in the performance of, depot-level maintenance and repair workloads may not be managed on the basis of any constraint or limitation in terms of man years, end strength, full-time equivalent positions, or maximum number of employees. Such employees shall be managed solely on the basis of the available workload and the funds made available for such depot-level maintenance and repair.