A former public official, former public member, or former public employee holding public office, membership, or employment on or after January 1, 1992, may not for a period of one year after terminating his public service or employment:
(1) serve as a lobbyist or represent clients before the agency or department on which he formerly served in a matter which he directly and substantially participated during his public service or employment; or
(2) accept employment if the employment:
(a) is from a person who is regulated by the agency or department on which the former public official, former public member, or former public employee served or was employed; and
(b) involves a matter in which the former public official, former public member, or former public employee directly and substantially participated during his public service or public employment.