(1) For the purposes of this Division, a request or agreement of another country :
(a) need not be in writing; and
(i) a standing request or agreement;
(ii) a request or agreement relating to particular circumstances;
(iii) a request or agreement that covers a particular period of time.
( 2) The request or agreement may be made or given by any of the following:
(a) the head of state of the country;
(b) the head of the government of the country;
(c) the minister of the government of the country who is responsible for foreign affairs;
(d) the minister of the government of the country who is responsible for defence;
(e) any official or body of the country that has, or could be
expected to have, authority to make or give such a request or agreement .