The Australian Design Rules (ADRs) are the national technical regulations for vehicle safety, theft resistance, and emissions requirements in Australia. All new road vehicles manufactured in Australia and imported new or second-hand vehicles, must comply with the relevant ADRs when they are first supplied to the Australian market. The relevant State or Territory government legislation generally requires that it complies with the relevant ADRs as at the time of manufacture. The ADRs are largely based on and actively harmonised with the UN vehicle and equipment regulations. An ADR may directly specify technical and performance requirements, as well as allow alternative standards to be met instead. The alternative standards are typically the same UNECE regulations as those directly specified. Most ADRs have been fully harmonised with UNECE regulations, meaning that a manufacturer only needs to provide evidence of a UNECE approval, or a valid test to the requirements of a regulation, in order to demonstrate compliance with an ADR. Those ADRs that are only partially harmonised with UNECE Regulations require additional Australian requirements that must also be met. Where an ADR is harmonised, the base text of the UNECE regulation forms the main text of the ADR.