(1) Examinations for promotions shall be among the members of the lower classifications or grades established for each department who desire to offer themselves for such examination. The regulations adopted for examination of applicants for promotion shall, as near as may be, follow the regulations governing the examination of applicants for original appointment.

(2) The commission shall by its regulations prescribe the weight to be given to the recommendation of the appointing power touching the qualifications of the candidate for promotion, and where a record of fidelity and efficiency is regularly kept in good faith in any department the commission shall give it at least equal value with the record of examination for promotion.