Updated 3.34pm: The agency tasked with being a watchdog for the country's intelligence agencies thinks it could cope with the workload imposed by changes to SIS and passport laws.

Parliament's looking at extending the surveillance powers of the SIS in its foreign fighters legislation.

The Inspector General of Intelligence and Security, Cheryl Gwyn, says at this stage she wouldn't expect the changes would substantially expand the workload of her office.

She expects they could cope within their existing resources once they are fully staffed, but she would like the opportunity to review it once the legislation is in force.

She says her office has full access to intelligence agency offices and their material.

She says she has no indication either agency is attempting to hide when things go wrong.

Ms Gwyn says there's never 100 percent assurance but she's confident has access to, and are provided with, the information they need to do their job properly.

SIS minister happy with compromise

The SIS minister is relaxed about changes to urgent anti-terror legislation that will allow the SIS to carry out video surveillance but face more oversight.

The government has agreed to Labour's demand, to halve the 48-hour window for SIS video surveillance before receiving a warranting, and restricting that surveillance to foreign fighter cases.

SIS Minister Chris Finlayson says he's happy with the compromise.

"It's focusing very closely on the issue of those who want to go overseas and fight with ISIS and I think the 24 hour period is acceptable and I think the safeguard stuff inserted is all acceptable."

Govt revises SIS bill

The Government looks set to get cross party support for its foreign fighters bill after making changes to areas that were most complained about.

The watchdog of the country's spy agencies is to get greater oversight in changes to the Government's foreign fighters Bill.

A Parliamentary Committee has tweaked the legislation meaning the SIS will have to report more of its activities to the Inspector General of Intelligence and Security.

Under the changes, copies of visual surveillance warrants will have to be provided to the Inspector General.

The SIS will also have to notify the watchdog about matters pertaining to 24 hour warrant-less surveillance.

Under the new rules the Inspector general would be called on to investigate cases of warrant-less SIS surveillance where no subsequent warrants for surveillance are issued.

The select committee which heard submissions clarified what happens if a passport's taken off a New Zealander overseas.

They will be able to travel back on emergency documents and won't be stateless, just not able to travel.

The sunset clause has been brought back a year, meaning a new law will be enacted by April 1, 2017.

Labour on board with Govt

The Labour Party is on board with the Government over its foreign fighters' law.

Unwarranted surveillance by the SIS has been cut back from 48 to 24 hours and a new law will have to replace it by April, 2017, a year earlier than planned.

John Key says Labour's support should give people more confidence in the changes being made.

Mr Key says any Government always likes bi partisan support for security measures because it goes to the heart of people's safety.

The Greens and New Zealand First are still opposed to it.