Amends GS 120C-304 by prohibiting a legislator or former legislator from registering as a lobbyist while in office, and before the later of the close of session in which the legislator served or for one year (was, six months) after leaving office. Prohibits Constitutional officers of the State and individuals elected or appointed as constitutional officers of the State prior to taking office from registering as a lobbyist while in office or within for a period of one year (was, six months) after leaving office. Also prohibits heads of all principal State departments, who are appointed by the Governor from registering as a lobbyist while in office or within for a period of one year (was, six months) after separation from employment. Further prohibits other employees of any State agency from registering as a lobbyist to lobby the agency that previously employed the employee for a period of one year (was, six months) after voluntary separation or separation for cause from that State agency. Makes conforming changes. Effective October 1, 2017.