An independent Australian senator says she'll support a government bill to repeal the medevac laws on one condition.
The laws ease the transfer of sick refugees to Australia from Papua New Guinea and Nauru.
Senator Jacqui Lambie is expected to have the deciding vote on the repeal bill which was due for debate yesterday in the Senate.
But yesterday afternoon, Ms Lambie issued a statement that suggested the government might delay a senate vote.
She said while she supported offshore detention and protecting Australia's borders she did not believe they were undermined by the medevac laws.
Ms Lambie said she would only support the repeal bill if it included an undisclosed amendment, which she has proposed to the government.
Her statement followed the presentation of a letter signed by more than 5000 doctors calling on Parliament to maintain the medevac laws.