(1) The Director, or an employee of the Bureau, or a person acting on behalf of the Bureau may, without an interception warrant, or, as the case requires, without a computer access authorisation, intercept foreign communications only if the interception is authorised by this Act or by another enactment.
(2) The Director, or an employee of the Bureau, or a person acting on behalf of the Bureau may, without an interception warrant, or, as the case requires, without a computer access authorisation, intercept foreign communications by using an interception device, but only if—