(a)
Prohibition— Except as provided in subsection (b), not later than 90 days after the date of the enactment of this Act, the Director of the Office of Management and Budget shall issue guidelines that prohibit the access of a pornographic or other explicit web site from a Federal computer.
(b)
Exception— The prohibition described in subsection (a) shall not apply to any Federal computer that is used for an investigative purpose that requires accessing a pornographic web site.