"If you act covertly on behalf of a foreign actor in a way that harms Australia's national security,to influence the political process,or a government decision,that conduct will be criminalised,"Senator Brandis said.

He strongly suggested that Senator Dastyari's conduct in 2015,in which he received money from a business connected to Chinese-linked business Huang Xiangmo and then made public remarks supporting Beijing's position on the South China Sea contrary to both government and Labor policy,would fall under the new offence.

Senator Brandis said it could be interpreted to cover opposition party policy as well as governments.

"In my view,the conduct alleged against him does not reach the threshold of the existing laws of treason and espionage,but that is why we are introducing - because of the gap in those laws,a new offence of unlawful foreign interference,"he said.

Former trade minister Andrew Robb would also have to register on the list of agents,Senator Brandis said,because of his $800,000-a-year consultancy with Chinese firm the Landbridge Group,which controls Darwin Port.

"Somebody in Mr Robb's position would be required to register under the transparency scheme,"Senator Brandis said."A person who has been a cabinet minister within the previous three years must register if he acts on behalf of a foreign government,a foreign public enterprise,a foreign business or a foreign political organisation."

He said former MPs and senior federal government officials working for those foreign organisations would also have to register with the scheme if they used the skills they had gained from their parliamentary or government work in their new roles.

Senator Brandis also indicated groups such as the University of Technology Sydney's Australia-China Relations Institute,headed by former foreign minister Bob Carr,could have to register.

He stressed that foreign actors and lobbying were both fairly broadly defined in the new laws. Foreign actors included not just governments but also"a foreign public enterprise,a foreign political organisation,a foreign business or an individual". Lobbying was defined as communicating"in any way with a person or group or persons for the purpose of influencing a process,decision or outcome".