(a) The purpose of this chapter is to consolidate the administrative requirements and establish uniform procedures for the occupational licensing and registration programs prescribed by Texas Water Code, Chapter 37. This subchapter contains general procedures for issuing, renewing, denying, suspending, and revoking occupational licenses and registrations. Subchapters B - L of this chapter (relating to Backflow Prevention Assembly Testers; Customer Service Inspectors; Landscape Irrigators, Irrigation Technicians, and Irrigation Inspectors; Leaking Petroleum Storage Tank Corrective Action Project Managers and Specialists; Municipal Solid Waste Facility Supervisors; On-Site Sewage Facilities Installers, Apprentices, Designated Representatives, Maintenance Providers, Maintenance Technicians, and Site Evaluators; Water Treatment Specialists; Underground Storage Tank On-Site Supervisor Licensing and Contractor Registration; Wastewater Operators and Operations Companies; Public Water System Operators and Operations Companies; and Visible Emissions Evaluator Training and Certification) contain the program-specific requirements related to each program.(b) The requirements of this chapter apply to the following occupational licenses and registrations:(1) backflow prevention assembly testers;(2) customer service inspectors;(3) landscape irrigators, irrigation technicians, and irrigation inspectors;(4) leaking petroleum storage tank corrective action specialists and project managers;(5) municipal solid waste facility supervisors;(6) on-site sewage facility installers, designated representatives, apprentices, maintenance providers, maintenance technicians, and site evaluators;(7) water treatment specialists;(8) underground storage tank contractors and on-site supervisors;(9) wastewater operators and operations companies;(10) public water system operators and operations companies; and(11) visible emissions evaluator training and certification.