▁September ▁ 1 9 5 1 ▁ 1 9 7 3 ▁– ▁Exchange ▁of ▁Let ters ▁const itut ing ▁an ▁Ag re ement ▁between ▁the ▁Government ▁of ▁Australia ▁and ▁the ▁Government ▁of ▁Canada ▁concerning ▁the ▁Future ▁Operation ▁of ▁the ▁Trade ▁Ag re ement ▁of ▁ 1 2 ▁February ▁ 1 9 6 0 ▁ 1 9 7 4 ▁– ▁Trade ▁Ag re ement ▁between ▁the ▁Government ▁of ▁Australia ▁and ▁the ▁Government ▁of ▁the ▁German ▁Democratic ▁Republic , ▁and ▁Ag re ed ▁Min ute ▁ 1 9 7 4 ▁– ▁Exchange ▁of ▁Notes ▁const itut ing ▁an ▁Ag re ement ▁between ▁the ▁Government ▁of ▁Australia ▁and ▁the ▁Government ▁of ▁Canada ▁am ending ▁the ▁Air ▁Services ▁Ag re ement ▁of ▁ 1 1 ▁June ▁ 1 9 4 6 ▁and ▁can cell ing ▁Am ending ▁Ag re ement ▁of ▁ 1 6 ▁March ▁ 1 9 5 1 ▁ 1 9 7 4 ▁– ▁Exchange ▁of ▁Notes ▁const itut ing ▁an ▁Ag re ement ▁between ▁the ▁Government ▁of ▁Australia ▁and ▁the ▁Government ▁of ▁the ▁Federal ▁Republic ▁of ▁Germany ▁am ending ▁the ▁Ag re ement ▁rel ating ▁to ▁Air ▁Transport ▁of ▁ 2 2 ▁May ▁ 1 9 5 7 ▁ 1 9 7 4 ▁– ▁Trade ▁Ag re ement ▁between ▁the ▁Government ▁of ▁Australia ▁and ▁the ▁Imperial ▁Government ▁of ▁Iran ▁ 1 9 7 4 ▁– ▁Exchange ▁of ▁Notes ▁const itut ing ▁an ▁Ag re ement ▁between ▁the ▁Government ▁of ▁Australia ▁and ▁the ▁Government ▁of ▁the ▁People ' s ▁Republic ▁of ▁China ▁concerning ▁the ▁Reg