shall execute and record in the appropriate office an instrument of modification of the deed of conveyance executed pursuant to Public Law 85–236 in order to authorize such use of the property. The instrument shall include such additional terms and conditions as the Administrator considers appropriate to protect the interests of the United States. LXXXI Department of Energy National Security Programs 8101. Implementation of common financial reporting system for nuclear security enterprise Not more than 90 percent of the funds authorized to be appropriated by section 3101 for the National Nuclear Security Administration for fiscal year 2020 for Federal salaries and expenses and available for travel and transportation may be obligated or expended before the date on which the Administrator for Nuclear Security completes implementation of the common financial reporting system for the nuclear security enterprise as required by section 3113(a) of the National Defense Authorization Act for Fiscal Year 2017 ( Public Law 114–328