The measure would place several restrictions on the NSPS pay for performance system, specifying that employees under NSPS who are performing above the unacceptable level must receive an annual raise of at least 60 percent of the amount going to federal employees generally. DoD applied such a policy for the 2008 NSPS raises even though that provision was not yet in law. Also, under the measure, should union-represented employees be brought into NSPS, changes in pay procedures for them would be subject to bargaining. The bill also excludes wage grade employees from coming under NSPS, as well as employees of certain defense labs that already are experimenting with alternative personnel systems. It further would limit the number of employees who can be brought into the system to 100,000 a year and order a series of studies by GAO.