Section 15(2) in The Delhi Police (Appointment & Recruitment) Rules, 1980
(2)After the training of 6 months, they shall be tested by a board of officers to be nominated by additional Commissioner of Police (Armed Police and Training) for training in 48 weeks Basic Armourers Course of Armoury School of Instructions according to the number of seats allotted by the army authorities. On successfully completing the Armourers Basic Training Course, they shall be appointed as Armourers against sanctioned posts according to their seniority, reckoned from the date of passing the course. Those qualifying on the same date shall have inter- seniority on the basis of their original seniority in the rank of constable.
