No question in any examination or proceeding by or under the Commission of examiners shall call for the expression or disclosure of any political or religious opinion or affiliation, nor shall any discrimination be made by reason thereof if known; and the Commission and its examiners shall discountenance all disclosure before either of them of such opinion by or concerning any applicants for examination or by or concerning anyone whose name is on any register awaiting appointment. RULE IX. All regular applications for the competitive examinations for admission to the classified service must be made on blanks in a form approved by the Commission. All requests for such blanks and all applications for examination must be addressed as follows: (1) If for the classified departmental service, to the United States Civil Service Commission, Washington, D.C.; (2) if for the classified postal service, to the postmaster under whom service is sought; (3) if for the classified customs service, to the head of either customs office in which service is sought. All officers receiving such applications will indorse thereon the date of the reception thereof and transmit the same to the proper examining board of the district or office where service is sought or, if in Washington, to the Civil Service Commission. RULE X. Every examining board shall keep such records and such papers on file and make such reports as the Commission shall require, and any such paper or record in the charge of any examining board or any officer shall at all times be open to examination as the Commission shall direct, and upon its request shall be forwarded to the Commission for inspection and revision. RULE XI. Every application, in order to entitle the applicant to appear for examination or to be examined, must state under oath the facts on the following subjects: (1) Full name, residence, and post-office address; (2) citizenship; (3) age; (4) place of birth; (5) health and physical capacity for the public service; (6) right of preference by reason of military or naval service; (7) previous employment in the public service; (8) business or employment and residence for the previous five years; (9) education. Such other information shall be furnished as the Commission may reasonably require touching the applicant's fitness for the public service. The applicant must also state the number of members of his family in the public service and where employed, and must also assert that he is not disqualified under section 3 of the civil-service act, which is as follows: "That no person habitually using intoxicating beverages to excess shall be appointed to or retained in any office, appointment, or employment to which the provisions of this act are applicable." RULE XII.