Terror law change 'not shooting response'

Malcolm Turnbull says changes to anti-terrorism control orders are not a direct response to the October 2 shooting in Parramatta.

The government will bring to parliament in November new laws to lower the age at which terror suspects can be slapped with control orders to 14.

The prime minister on Tuesday said the law change had been in the works for "some considerable time", rather than a response to the execution-style shooting of police accountant Curtis Cheng outside the NSW police headquarters.