0 per cent or over, shall be eligible for
appointment to the place for which they were examined. The names of all
competitors thus rendered eligible shall be entered in the order of
grade on the proper register of eligibles.

5. The Commission shall establish regulations for the order of
certification of applicants who are registered without competitive
examinations under the provisions of Rule II, paragraph I.

6. When two or more eligibles are of the same grade, preference in
certification shall be determined by the order in which the application
papers are filed.

7. The period of eligibility to appointment shall be one year from the
date on which the name of the eligible is entered on the register,
unless otherwise determined by regulations by the Commission.

RULE IV.

1. All vacancies, unless filled by promotion, transfer, or
reappointment, shall be filled in the following manner:

(_a_) The Public Printer shall, in form and manner to be prescribed
by the Commission, request the certification to him of either males or
females, or both, eligible to the vacant place.

(_b_) If fitness for the vacant place is tested by competitive
examination, the Commission shall certify from the proper register the
names of the three eligibles thereon, of the sex or sexes called for,
having the highest averages, who have not been three times certified:
_Provided_, That the eligibles upon any register who have been
allowed preference under section 1754 of the Revised Statutes shall be
certified according to their grade before all other eligibles thereon:
_And provided further_, That if the vacancy is in a position for
which a competitive examination can not be provided certification shall
be made of the names of the first three eligibles on the register, of
the sex or sexes called for, who have not been three times certified.

2. Of the three names certified to him the Public Printer shall select
one, and if at the time of making this selection there are more
vacancies than one he may select more than one: _Provided_, That if
the Public Printer shall object in writing to any eligible named in the
certification, stating that because of physical incapacity or for other
good cause particularly specified such eligible is not capable of
properly performing the duties of the vacant place, the Commission may,
upon investigation and ascertainment of the fact