of a military department, or the service headquarters of one of the Armed Forces into a legislative affairs or legislative liaison office: Provided further , That $9,385,000, to remain available until expended, is available only for expenses relating to certain classified activities, and may be transferred as necessary by the Secretary of Defense to operation and maintenance appropriations or research, development, test and evaluation appropriations, to be merged with and to be available for the same time period as the appropriations to which transferred: Provided further , That any ceiling on the investment item unit cost of items that may be purchased with operation and maintenance funds shall not apply to the funds described in the preceding proviso: Provided further , That of the funds provided under this heading, $415,000,000, of which $100,000,000 to remain available until September 30, 2019, shall be available to provide support and assistance to foreign security forces or other groups or individuals to conduct, support or facilitate counterterrorism, crisis response, or other Department of Defense security cooperation programs: Provided further , That the transfer authority provided under this heading is in addition to any other transfer authority provided elsewhere in this Act. Operation and maintenance, army reserve For expenses, not otherwise provided for, necessary for the operation and maintenance, including training, organization, and administration, of the Army Reserve