A crucial term in the GCSB amendment bill was singled out for clarification yesterday by Appeal Court Judge Sir Grant Hammond.
Sir Grant said the definition of the term "private communications" within the protection clause of the bill was not clear and, because it was central to the protections in the bill, it needed further work.
"It's a trigger provision. A lot of other things turn on it. What worries me ... is that if it is not sufficiently dealt with in the act then the judiciary end up dealing with it."
Sir Grant, who is chairman of the Law Commission, appeared as chairman of the Legislation Advisory Committee (LAC) before the Intelligence and Security Committee.
Chaired by Prime Minister John Key, the committee is hearing submissions on the Government Communications Security Bureau and Related Legislation Amendment Bill. The function of the LAC is to give advice on whether legislation will actually achieve its ends.