In a statement,a department spokesman said visa applications had to meet all requirements,including relevant national security and character criteria,before they could be granted.
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"There is no discretion to waive legislative checks or requirements and the department has no evidence that this has occurred."
Key Senate crossbencherJacqui Lambie joined Tasmanian counterpart Andrew Wilkie on Monday to demand an inquiry afterThe Sydney Morning Herald,The Age and60 Minutesrevealed a string of allegations about government officials and the casino's domestic and international operations.
Labor has not ruled out supporting an inquiry but the Morrison government would have to support the push to ensure a joint committee gained support in both houses of Parliament.
A hearing would have the power to call Crown employees and senior government officials to give evidence.
Opposition home affairs spokeswoman Kristina Keneally said the government"needed to explain"the reports and"address the failures"of Home Affairs Minister Peter Dutton.
"The integrity of our visa system as well as money laundering,organised crime and sex trafficking are serious issues that cannot go unexplained by Mr Dutton,"she said.
"All roads lead to Peter Dutton's mismanagement and incompetence – if he does not explain himself,Labor will consider our options to hold the Home Affairs Minister accountable.”
Attorney-General Christian Porter said he had not seen the60 Minutes report but expected briefings if required from regulators including the Australian Transaction Reports and Analysis Centre,which monitors money-laundering.
Prime Minister Scott Morrison told Parliament the allegations raised were"a very serious topic"and dealt with the integrity of the gaming industry and law enforcement issues.
"Everyone is required to abide by the Australian law including casino operators,public officials and all visitors to our country,"he said.
"Our law enforcement agencies are working hard to disrupt and deter criminal groups by collecting evidence and intelligence about financially motivated crime."
Crown Resorts has longstanding connections with people on both sides of politics and has hired a number of former politicians.
Former Liberal cabinet minister Helen Coonan is on the Crown board and former Labor minister Mark Arbib has worked closely with the company in the past as an adviser to James Packer and his company Consolidated Press Holdings,the largest single shareholder in Crown.