The Bayu Undan to Darwin Pipeline is a 502 km, 26-inch, transmission pipeline that connects the Bayu-Undan field in the Timor Sea to the Darwin LNG plant at Wickham Point. The pipeline is owned and operated by ConocoPhilips Pipeline Australia.

The largest section of the pipeline is in Commonwealth waters and is regulated by the National Offshore Petroleum Safety and Environmental Managemnt Authority and Northern Territory Water. The section of the pipeline within the Northern Territory coastal waters is regulated by the Northern Terrritory Government under the Energy Pipeline Act and NT Coastal Pipeline Licence.

The Bayu Undan to Darwin LNG Pipeline is currently a non-scheme pipeline, and is subject to the access regime for non-scheme pipelines  under Part 10 of the National Gas Rules (NGR). It was previously subject to the access regime for non-scheme pipelines under the former Part 23 of the NGR, which was replaced by Part 10.

The AER has granted the following exemptions for the Bayu Undan to Darwin Pipeline:

• On 28 November 2019, a five year Category 1 and 2 exemption. Due to reforms to the NGR, the exemptions transitioned to a Category 1 exemption under Part 10 of the NGR. 
• On 4 July 2024, a further five year Category 1 exemption.