As used in this subchapter:
(1) “Board” means a regional solid waste management board established pursuant to § 8-6-701 et seq., or a successor board to the powers of the board;
(2) “Commission” means the Arkansas Pollution Control and Ecology Commission;
(3) [Repealed.]
(4) “District” means a regional solid waste management district as established by § 8-6-701 et seq., or a successor district of a regional solid waste management district;
(5) “Landfill” means a permitted landfill under the Arkansas Solid Waste Management Act, § 8-6-201 et seq.; and
(6) “Solid waste” means the same as provided by § 8-6-702.