Chapter XIV: Section 4: And be it further enacted, That applicants for

examination shall be citizens of the United States, (including all persons born in the United States, and not owing allegiance elsewhere,) between the ages of eighteen and twenty-five, and shall furnish such testimonials of personal character and take such oath of allegiance as the Board shall prescribe: _Provided_, That, if the examination is for any office the duties of which are to be performed in any particular State, then the applicant, in addition to the above requirements, shall have resided in such State one year before the time of examination, and in such case the Board shall designate a place of examination within such State: _Provided, however_, That the President may suspend the operation of the preceding proviso as to any States or parts of States where he may deem it expedient so to do.