The Environment Protection Act 1993 also covers the global environmental problem of the thinning of the ozone layer caused by the use of various human-made chemicals such as CFCs. These provisions are found in sections 74 -78 of the Act and in the Environment Protection (Ozone) Regulations, 1994. These standards reflect similar Commonwealth laws, which give effect to our international treaty obligations under the Montreal Protocol and other international agreements. Under the Act, no person may manufacture, use, store, sell or offer for sale or dispose of a prescribed substance unless they are the holder of an authorisation granted by the EPA. Prescribed substances include chlorofluorocarbons and halons as set out in Schedule 1 of the Ozone Protection Act 1989 (Cth), together with any other substance which may be prescribed by the Environment Protection (Ozone) Regulations, 1994 or the Environment Protection Act 1993. Under the Ozone Protection Act 1989 (Cth), the Commonwealth has provided for a system of licences and tradeable quotas for import and export of chlorofluorocarbons (CFCs) and halons and controls the use and manufacture of certain substances so as to limit their emission.