(1) Joint services, common to the Federation and one or

133. (1) Joint services, common to the Federation and one or more of the States or, at the request of the States concerned, to two or more States, may be established by federal law. (2) Where a member of any of the public services is employed— (a) partly for federal purposes and partly for State purposes; or (b) for the purposes of two or more States, the proportion, if any, of his remuneration payable by the Federation and the State or States concerned or, as the case may be, by each of the States concerned, shall, subject to federal law, be determined by agreement or, in default of agreement, by the Commission whose jurisdiction extends to him. Secondment of officers