Liberal Democrats senator David Leyonhjelm has raised questions about tough police powers in place for the G20 leaders’ summit in Brisbane.

The federal government is satisfied extra powers given to police during the G20 summit in November are needed.

The powers given to federal and state police involved in security for the annual leaders’ summit in Brisbane include a presumption against bail, the reversal of the onus of proof and the ability to strip-search.

State regulations, which are yet to be unveiled, could go further.

The powers will only apply to the period of the summit.

Liberal Democrats senator David Leyonhjelm raised the issue in Parliament on Wednesday, asking the acting justice minister David Johnston whether the federal government supported the powers.

Senator Johnston said the laws gave police sufficient powers to maintain safety and security at the summit.

“They’re not out of the ordinary,” he said.

Extra police powers had been brought in for the Commonwealth Heads of Government Meeting in Perth in 2011 and the APEC summit in 2007.

“They are entirely necessary and are specifically focused on security for the summit,” Senator Johnston said.

Asked whether it gave a “blank cheque” to police, the minister said officers would stick to “due process”.

The Senate will also be asked to vote on federal laws mirroring those in Queensland.