; and not to exceed $12,677,000 of such offsetting collections shall be available until expended for move, replication, and related costs under this heading associated with a replacement lease for the Commission’s San Francisco Regional Office facilities: Provided further , That the total amount appropriated under this heading from the general fund for fiscal year 2021 shall be reduced as such offsetting fees are received so as to result in a final total fiscal year 2021 appropriation from the general fund estimated at not more than $0: Provided further , That if any amount of the appropriation for move, replication, and related costs associated with a replacement lease for the Commission’s District of Columbia headquarters office facilities or if any amount of the appropriation for costs associated with a replacement lease for the Commission’s San Francisco Regional Office is subsequently de-obligated by the Commission, such amount that was derived from the general fund shall be returned to the general fund, and such amounts that were derived from fees or assessments collected for such purpose shall be paid to each national securities exchange and national securities association, respectively, in proportion to any fees or assessments paid by such national securities exchange or national securities association under section 31 of the Securities Exchange Act of 1934 ( 15 U.S.C. 78ee ) in fiscal year 2021. administrative provisions—securities and exchange commission 540. None of the funds made available by this Act may be used to finalize, issue, or implement any rule, regulation, or order regarding the exempt offering framework changes proposed at 85 Fed. Reg. 17956 without previously finalizing, issuing, or implementing a final rule strengthening the filing requirements around exempt offerings in the same or stronger manner as proposed at 78 Fed. Reg. 44806 to enhance the Securities and Exchange Commission’s ability to evaluate the development of market practices in Rule 506 offerings and to address concerns that