or otherwise made available by this Act may be used to transfer any element of the Department of the Army, the Department of the Navy, or a Defense Agency to the United States Space Force unless, not less than 60 days prior to initiating such transfer, the Secretary of Defense certifies in writing to the Committees on Appropriations of the House of Representatives and the Senate that such transfer is in the national security interest of the United States and will not have an adverse impact on the Department or agency from which such element is being transferred: Provided , That such certification shall include a detailed description of the element and timeline for such transfer. 8119. Funds appropriated in titles I and IX of this Act under the heading Military Personnel may be used for expenses described therein for members of the United States Space Force on active duty: Provided , that amounts appropriated under such headings may be used for payments pursuant to section 156 of Public Law 97–377 , as amended ( 42 U.S.C. 402 note), and to the Department of Defense Military Retirement Fund. 8120. Prior to the initial obligation of funds made available in titles II and IX of this Act for the Defense Security Cooperation Agency (DSCA), the Director of DSCA shall submit a spend plan by budget activity and sub-activity to the Committees on Appropriations of the House of Representatives and the Senate: Provided , That for funds planned for International Security Cooperation Programs, the Director shall, in coordination with the commanders of each geographic combatant command, include amounts planned for each combatant command and country, and a comparison to such amounts provided in the previous 3 fiscal years: Provided further , That amounts in such plan shall only reflect those amounts designated in the fiscal year 2021 budget justification materials and modified by the fiscal year 2021 appropriations adjustments in this Act and in the table in the report accompanying this Act: Provided further , That the Secretary