(1) All laws providing for the organization, jurisdiction, and operation of county boards and commissions, except the laws relating to county hospital boards of governors and except laws relating to county nursing home boards, shall be given the status of county ordinance until June 30, 1978. These organizations shall continue to function under those respective laws until reorganized by county ordinance. The organizations subject to reorganization by county ordinance are, but are not limited to, the following: County library boards;
(2) County planning boards;
(3) County park commissions; and
(4) County welfare boards.
(5) Advisory board members appointed as a result of a reorganizational ordinance shall have a term of appointment as specified in this subchapter.
(6) Ordinances enacted by a county quorum court for the reorganization of county government into county departments, with or without advisory or administrative boards or subordinate service districts, may be adopted in a single reading of the court.