Section 194(4) in The Naval Ceremonial, Conditions Of Service And Miscellaneous Regulations, 1964
(4)Candidates who pass the preliminary professional examination shall be placed on a roster for selection to undergo a further course and examination for Commissioned Bandmaster in accordance with the date of passing the preliminary professional examination. In making the selection, due consideration shall be given to seniority, percentage of marks obtained in the preliminary professional examination and their reports on the form specified in Appendix III.