(5) For the rejection of candidates or eligibles who fail to comply with the reasonable requirements of the Commission in regard to age, residence, sex, physical condition or who have been guilty of crime or of infamous or disgraceful conduct or who have attempted any deception or fraud in connection with an examination. (6) For the appointment of one of the three persons standing highest on the appropriate list. (7) For a period of probation not to exceed six months before appointment or promotion is made complete, during which period a probationer may be discharged or reduced with the consent of the Commission. (8) For non-competitive examinations for minor positions in the county institutions when competition is found to be impracticable. (9) For temporary employment of persons on the eligible list until list of the class covering the temporary employment is exhausted; and in cases of emergency, for temporary employment without examination, with the consent of the Commission, after the eligible list has been exhausted. But no such temporary employment shall continue longer than sixty days, nor shall successive temporary appointments be allowed. Nor shall the acceptance or refusal to accept such temporary appointment on the part of a person on the eligible list be a bar to appointment to a permanent position from said eligible list. (10) For transfer from one position to a similar position in the same class and grade and for reinstatement within one year of persons who without fault or delinquency on their part are separated from the service or reduced. (11) For promotion based on competitive examination and records of efficiency, character, conduct and seniority. Lists shall be created and promotion made therefrom in the same manner as prescribed for original appointment. An advancement in rank or an increase in salary beyond the limit fixed for the grade by the rules shall constitute promotion. Whenever practicable, vacancies shall be filled by promotion. (12) For suspensions for not longer than thirty days and for leaves of absence. (13) For discharge or reduction in rank or compensation after appointment of promotion is complete, only after the person to be discharged or reduced has been presented with the reasons for such discharge or reduction, specifically stated and has been allowed a reasonable time to reply thereto in writing. The reasons and the reply must be filed as a record with the Commission. (14) For the appointment of unskilled laborers and such skilled laborers as the Commission may determine in the order of priority of application after such tests of fitness as the Commission may prescribe.