IX.  The various subjects of the examination may be subdivided, if thought desirable, into classes, and to each subject or class a relative weight, according to its importance in the examination, will be assigned by each board of examiners.  The mode of ascertaining the result of the examination will be as follows:  The degree of accuracy with which each question shall be answered will first be marked by the board on a scale of 100.  The average of the marks given to the answers to the questions in each subject or class will next be ascertained.  Each average will then be multiplied by the number indicating the relative weight of the subject or class, and the sum of the products will be divided by the sum of the relative weights.  The quotient will determine the candidate’s standing in the examination.  Relative weight will be assigned not merely to the special qualifications of the candidates, but to their general aptitude, as shown in the course of examination.  Candidates will be examined during office hours, and in no case will their examination be continued more than one day.

X. The board of examiners will prepare a list of the persons examined in the order of their excellence, as proved by such examination, beginning with the highest, and will then certify to the head of the office the names standing at the head of such list, not exceeding three.  When more than one appointment is to be made, the vacancies will be numbered, and the first three names will be certified for the first vacancy, the remaining two and the fourth for the second vacancy, the remaining two and the fifth for the third vacancy, and so on for the whole number of vacancies; but if, after selecting one of any three certified for appointment, the head of the office shall object to another presentation of either of the remaining names, it shall not be again certified.

XI.  The examination papers of any candidate who shall have passed a minimum standard of 75 per cent, but who shall fail to be appointed, will, if requested by the candidate, be brought into competition with those candidates who shall compete for vacancies of the same class and nature occurring within one year:  Provided, however, That the candidate shall not have been specially objected to by the head of the office under the last preceding regulation.  No candidate who upon examination has been marked below the minimum will be allowed to again compete within one year from the date of such examination, unless for admission to a lower group.

XII.  All examination papers will be filed, and will at all times be open to the inspection of those interested, under such restrictions as may be imposed by the head of the office.