; and for the capital asset acquisition of information technology systems, including management and related contractual costs of said acquisitions, including contractual costs associated with operations authorized by section 3109 of title 5, United States Code, $4,105,500,000, plus reimbursements: Provided , That $1,235,320,000 shall be for pay and associated costs, of which not to exceed 5 percent shall remain available until September 30, 2020: Provided further , That $2,521,650,000 shall be for operations and maintenance, of which not to exceed 5 percent shall remain available until September 30, 2020: Provided further , That $348,530,000 shall be for information technology systems development, and shall remain available until September 30, 2020: Provided further , That amounts made available for information technology systems development may not be obligated or expended until the Secretary of Veterans Affairs or the Chief Information Officer of the Department of Veterans Affairs submits to the Committees on Appropriations of both Houses of Congress a certification of the amounts, in parts or in full, to be obligated and expended for each development project: Provided further , That amounts made available for salaries and expenses, operations and maintenance, and information technology systems development may be transferred among the three subaccounts after the Secretary of Veterans Affairs requests from the Committees on Appropriations of both Houses of Congress the authority to make the transfer and an approval is issued: Provided further , That amounts made available for the Information Technology Systems account for development may be transferred among projects or to newly defined projects: Provided further , That no project may be increased or decreased by more than $1,000,000 of cost prior to submitting a request to the Committees on Appropriations of both Houses of Congress to make the transfer and an approval is issued, or absent a response, a period of 30 days has elapsed: Provided further , That the