; (2) determined, in consultation with NIST and the Federal Bureau of Investigation, that the acquisition of such system is in the vital national security interest of the United States; and (3) reported that determination to the Committees on Appropriations of the House of Representatives and the Senate in a manner that identifies the system intended for acquisition and a detailed description of the mitigation strategies identified in (1), provided that such report may include a classified annex as necessary. Prohibition on Certain Operational Expenses 209. (a) None of the funds made available in this Act may be used to maintain or establish a computer network unless such network blocks the viewing, downloading, and exchanging of pornography. (b) Nothing in subsection (a) shall limit the use of funds necessary for any Federal, State, tribal, or local law enforcement agency or any other entity carrying out criminal investigations, prosecution, or adjudication activities or other official government activities. This Act may be cited as the Legislative Branch Appropriations Act, 2019 .