Licensing and Registration   HVAC technicians and contractors must hold the appropriate licenses and registrations in the state or territory where they work.   Each region may have its own regulatory authority responsible for issuing licenses and setting eligibility criteria.   Refrigerant Handling   Handling and managing refrigerants is tightly regulated in Australia to minimize environmental impact and protect public safety.   Technicians must hold the relevant refrigerant handling licenses, and proper procedures for refrigerant recovery and disposal.   Electrical Safety   Work involving electrical systems in HVAC installations falls under the jurisdiction of electrical safety regulations. Technicians.   Gas Safety   HVAC systems that use gas, such as gas heaters, must comply with gas safety regulations.   Industry associations, such as the Air Conditioning and Mechanical Contractors' Association (AMCA) and the Refrigeration and Air Conditioning Contractors Association (RACCA) provide guidelines and best practices for HVAC professionals.