1. Every regular application must be supported by proper certificates of
good moral character, health, and physical and mental capacity for doing
the public work, the certificates to be in such form and number as the
regulations of the Commission shall provide; but no certificate will be
received which is inconsistent with the tenth section of the
civil-service act.
2. No one shall be entitled to be examined for admission to the
classified postal service if under 16 or over 35 years of age, or to
the classified customs service or to the classified departmental service
if under 18 or over 45 years of age; but no one shall be examined for
appointment to any place in the classified customs service, except
that of clerk or messenger, who is under 21 years of age; but these
limitations of age shall not apply to honorably discharged soldiers
and sailors of the last war who are otherwise duly qualified.