a particular matter of general applicability and participation in the meeting or other event is open to all interested parties. . (b) Clerical amendment The table of sections of chapter 11 of title 18, United States Code, is amended by inserting after the item relating to section 219 the following new item: 220. Prohibition on participation in matter relating to previous employment. . (c) Application The amendments made after subsection (a) shall apply to any individual appointed to a covered position (as that term is defined in section 220(d)(2) of title 18, United States Code, as added by such subsection) after the date of enactment of this Act.