e filled by original
appointment.

8. When two or more eligibles on a register have the same average
percentage, preference in certification shall be determined by the order
in which their applications were filed.

9. For filling vacancies in positions outside of the District
of Columbia and in positions in the pension agency, the depot
quartermaster's office, and other local offices in the District of
Columbia the territory of the United States shall be arranged in
such sections or districts as the Commission may determine, and an
eligible shall be certified in his order to vacancies in the section
or district in which he resides, and, upon his written request, to
vacancies in any one or more of the other sections or districts:
_Provided_, That in the custom-house service, post-office service,
or internal-revenue service an eligible shall be certified only to
vacancies in the customs district, post-office, or internal-revenue
district where he was examined.

10. In any part of the service in which the employment of substitutes is
not prohibited by law there may be certified and appointed in the manner
provided for in this rule only such number of substitutes as are
actually needed for the performance of substitute duty.

11. In any part of the service in which substitutes are employed
certifications of those eligible to original appointment shall be made
for filling vacancies in substitute positions only, and vacancies in
regular positions shall be filled by the appointment or promotion
thereto of substitutes in the order of their original appointment as
substitutes whenever there are substitutes of the required sex who are
eligible and willing to be so appointed or promoted. Substitutes so
appointed or promoted shall, however, be subject to the provisions of
these rules relating to probation and permanent appointment.

12. Upon request of the appointing or nominating officer preference
in certification may be given to the wife of the superintendent of an
Indian school for filling a vacancy in the position of teacher or matron
in said school.

13. Whenever there shall occur a vacancy which the public interest
requires shall be immediately filled and which can not be so filled in
time to meet the emergency by certification from the eligible registers,
such vacancy may, subject to the approval of the Commission, be filled
by temporary appo