7 The term "contractor, etc." as used in this Law shall mean persons who are ordinarily resident in the United States and corporations established or organized under the laws of the United States, whose presence in Japan is solely for purposee of maintenance, construction or operation under a contract concluded with the United States Government with respect to the construction, maintenance or operation of the facilities and areas which Japan agrees to be used by the United States armed forces for the achievement of the purpose mentioned in Article 1 of the Treaty (excluding the construction, maintenance, or operation of the military selling establishments, etc.;hereinafter the same) and those persons, as among persons ordinarily resident in the United States, who are employed solely in such construction, maintenance or operation and whose presence in Japan is solely for such construction, maintenance or operation.