The summary in the first link, which is not the legislation, says that employee approval is required. However that doesn't appear to be a part of the legislation itself. So I was wrong.I have looked at this legislation a few times since it has been brought to my attention on this thread. My interpretation of it is that if I give notification as specified in Section 10 of the Workplace surveillance Act, then even if the employee objects, I can legally proceed to activate my security cameras within 14 days. Is this your interpretation?
However if you are trying to force it on your employees without consultation or agreement you are going to get them really well offside. Whatever your rights, you really want your employees to be on your side- otherwise your business can be hurt badly.