In Australia, the EMC requirements of electrical products are monitored by the ACA (Australin Communications Authority). In addition to the standards used in Australia and New Zealand (AS/NZS), ACA recognized 103 other standards in 2002, including EN, IEC and CISPR.

In order to limit the impact of electromagnetic interference, Australia has imposed mandatory electromagnetic interference (EMI) requirements on all products within the scope of the standard since January 1999. Some EMC experimental items must also meet mandatory requirements. They are: conducted interference, intermittent interference (click), and radiated interference. There is no mandatory requirement for other EMC items. The product can only be affixed with the C-Tick mark after inspection and meets the relevant standards. Any company or individual who wants to use this logo must submit an application to the competent government department, and can use it after obtaining written approval, and the height of the logo must not be less than 3 mm

The C-Tick mark must be marked with the information of the Australian supplier in accordance with the regulations, so that ACA can effectively trace back to the supplier responsible for EMC of the product when sampling the product on the market. The identification of information includes four aspects:

1. The registered name and address of the Australian supplier.

2. Australian Company Number (Australian Company Number)

3. The number issued by the ACA to the Australian supplier.

4. The Australian registered trademark used in the Australian market

Australia's EMC system divides products into three levels. Suppliers must register with ACA and apply for the C-Tick mark before selling level two and level three products.

Level 1 product

Level 1 products refer to products with low interference radiation to devices using wireless spectrum, such as manual switches, simple relays, one-way squirrel cage induction motors, resistors, etc. For products of level 1, the supplier must sign a declaration of conformity and provide a product description. Level 1 products can apply for the C-Tick mark voluntarily, but after the supplier chooses to use the mark, it must provide a conformity statement and product description, as well as a conformity record to prove that the product described in the statement has been Conforms to relevant EMC standards. The test location is not required, and internal testing is allowed.

Level two products

Level 2 products refer to products that have high interference radiation to devices that use the wireless spectrum, such as switching power supplies, welding machines, dimmers, and most household appliances. In addition to signing a declaration of conformity and providing a product description, the supplier must also provide a test report in accordance with relevant standards. If there is no relevant standard, it needs to provide technical structure documents. The test location is not required, and internal testing is allowed.

Level three products

Level 3 products refer to products that have extremely high interference radiation to devices that use the wireless spectrum, that is, products covered by CISPR11 and CISPR22. At present, communication terminal products are still included in this scope, but starting from November 7, 2003, terminal products will be classified into level two products. In addition to signing a declaration of conformity and providing a product description, the supplier must also provide a test report issued by an accredited testing organization. At the same time, a quality management system certificate issued by the QSM certification body must be issued.