(1) The prescribed authority may enter into arrangements ( " protocols " ) with regulatory authorities of other jurisdictions about determining (a) the jurisdiction in which an Australian lawyer engages in legal practice principally or can reasonably expect to engage in legal practice principally; or(b) the circumstances in which an arrangement under which an Australian legal practitioner practises in a jurisdiction (i) can be regarded as being of a temporary nature; or(ii) ceases to be of a temporary nature; or(c) the circumstances in which an Australian legal practitioner can reasonably expect to engage in legal practice principally in a jurisdiction during the currency of an Australian practising certificate.(2) For the purposes of this Act, and to the extent that the protocols are relevant, a matter referred to in subsection (1)(a) , (b) or (c) is to be determined in accordance with the protocols.(3) The prescribed authority may enter into arrangements that amend, revoke or replace a protocol.(4) A protocol does not have effect in this jurisdiction unless it is adopted in the regulations.