; and (2) by adding at the end the following new subsection: (b) Treatment of workload activities (1) Percentage limitation Not more than 50 percent of the funds made available in a fiscal year for a military department or a Defense Agency for workload activities pursuant to subsection (a) may be used to contract for the performance by non-United States Government personnel of such workload for that military department or Defense Agency. (2) Amounts for activities by employees of Department of Defense (A) In general Any funds made available in a fiscal year to a military department or a Defense Agency for workload activities pursuant to subsection (a) that are not used for a contract described in paragraph (1) shall be used for the performance of those activities by employees of the Department of Defense. (B) Treatment of public-private partnerships Workload activities conducted pursuant to subsection (a) under a public-private partnership shall be deemed to be activities performed by employees of the Department of Defense for purposes of subparagraph (A). (3) Waiver of limitation (A) In general The Secretary of Defense may waive the limitation under paragraph (1) for a fiscal year if the Secretary determines that the waiver is necessary for reasons of national security. (B) Effect A waiver under subparagraph (A) shall not take effect until the date that is 30 days after the Secretary submits to the congressional defense committees a notification of the determination under such subparagraph, together with a justification for the determination. (4) Preferences for public-private partnerships in source selection process (A) In general The Secretary shall give preference to a non-public partner who has entered into a public-private partnership under section 2474 of this title in the source selection process if such partner uses an arsenal of the Department of the Army that is owned and operated by the United States Government as a partner in any type of contractual agreement with the United States Government to