What about:
(h) Notice of the provisions of subsections (a) and (b) shall be
posted conspicuously at each public entrance to each Federal
facility, and notice of subsection (e) shall be posted
conspicuously at each public entrance to each Federal court
facility, and no person shall be convicted of an offense under
subsection (a) or (e) with respect to a Federal facility if such
notice is not so posted at such facility, unless such person had
actual notice of subsection (a) or (e), as the case may be.
Nobody who wrote that knows what it means. It's just
more blaberations (law with no meaning or purpose).