Western Australia's Opposition says the state government ban on uranium mining in 2002 could leave the government vulnerable to millions of dollars in compensation claims from mining companies.
Premier Alan Carpenter has repeated his government's policy of no uranium mining in the state, despite pressure from other state Labor governments and state and federal Liberal politicians.
The state banned uranium mining after exploration companies had identified six potential mine sites with a combined ore body worth more than $14-billion at today's prices.
State Opposition leader Paul Omodei says the WA Government could be liable for breaching more than 40 state agreements with the mining industry.
"What happened was post 22nd of June 2002 they conducted a review of state agreement acts, and they found that there were these 40 agreement acts that could open up the government, so it's their own documentation.
"This is not just an allegation.
"If the right to mine uranium or any other mineral was specifically removed the state could open itself up to compensation - it's as simple as that."