Queensland Deputy Premier Jackie Trad has defended phoning the head of the corruption watchdog just hours before referring herself to the organisation for buying a house.
Ms Trad said she called Crime and Corruption Commission Chair Alan MacSporran on Sunday as a "courtesy".
She says she told him she would cooperate with any probe into her failure to declare the Woolloongabba home to parliament's register of members' interests within the required time frame.
"I volunteered this information (and) if I sought to influence Mr MacSporran in any way I don't think I would be disclosing it in parliament at an estimates committee hearing," she told ABC radio on Wednesday.
The matter has already been investigated by Integrity Commissioner Nikola Stepanov because the home is not far from the government's flagship Cross River Rail line.
However, Ms Trad will not release the advice until the CCC wraps up its investigation.
She has stepped down from her role heading up the government's $5.4 billion rail project in the wake of the scandal, but insists she had no role in the purchase.
Ms Trad said her husband had advised her by text that he was interested in purchasing a property, but said few details were discussed between them.
"It was at a time that a lot of other things were happening," she said.
"I trust my husband - he manages his income in the way that he decides."
She accepted she was a beneficiary of the trust involved in the purchase.
Ms Trad will depart on a trade mission to New York, Paris and London on Friday, a trip the premier says only her treasurer can make.
"It would send a very bad signal to world finance companies and investments, that Queensland was not open for business," Annastacia Palaszczuk said.
The state opposition says Ms Trad is running from scrutiny.
"It's inappropriate, we believe, for her to be fleeing the state, with this integrity cloud over her head," Liberal National Party deputy leader Tim Mander said.
Mr Mander believes Ms Trad compromised the integrity of the CCC when she contacted Mr MacSporran, and believes he should not take part in the investigation.
The property purchase was raised within the first budget estimates hearings on Tuesday.
It also revealed a company part-owned by Ms Palaszczuk's chief of staff, David Barbagallo, was given $267,500 in government funding to develop an app to track travellers when they go cruising.
Mr Barbagallo is a listed director and shareholder of Fortress Capstone Pty Ltd, which was paid from an $80 million business development fund created to back businesses with new ideas.
The premier says Mr Barbagallo assured her he had met his disclosure obligations, and that her director-general will look into the matter.
Australian Associated Press
