The policy update for the Perth and Canning Basin released on Wednesday would safeguard and secure supply while supporting long-term economic and industrial development in the state, the government said.
"To ensure domestic energy security, the WA Government will not consider exemptions from the WA Domestic Gas Policy for onshore gas developments on the existing pipeline network to export LNG, including those in the Perth Basin," the online statement said.
Gas from the existing liquefied natural gas pipeline is for WA industry and consumers only.
For the Canning Basin, these gas resources are not connected to the existing pipeline network and as such a normal application of the WA Domestic Gas Policy applies, the government said.
That is, gas project developers are required to make available 15 per cent of exports for the domestic market.
The industry said the decision to pre-empt findings of a gas inquiry and announce changes that would curb investment in new onshore gas supply was "extremely disappointing".
The state needs more gas supply to meet growing demand as coal shuts down and new mineral processing industries emerge, according to the Australian Petroleum Production and Exploration Association.
"But today's changes, and the way they have been announced, are the opposite of what is needed and will only diminish new gas supply investment and the state's path to net zero," the association's WA director Caroline Cherry said.
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