Engineer can be regularised through the Public Service Commission and Departmental Promotion Committee from an anterior date in a clear vacancy in his quota, if he is eligible and found suitable for such transfer or promotion, as the case may be, and his seniority will count from that date. The aforesaid conclusion was drawn because of the provisions of Rule 23 and Rule 15 of the Jammu and Kashmir Rules but in the case in hand, there is no provision, which has been brought to our notice, which enables the appointing authority to regularise a promotion from an anterior date, though the suitability test is held at a later date. In the absence of any such provision in the Rules in question, the ratio of the aforesaid decision, on interpretation of the relevant rules of the Jammu and Kashmir Engineering Rules will have no application. In the aforesaid premises, we have no hesitation in coming to the conclusion that merely because a suitability test had not been held at regular intervals an employee promoted on ad hoc basis can claim that it is a regular promotion after due process of selection. As such the seniority of promotees in the cadre of Senior Clerk can be counted only from the date of regular promotion, after due process of selection."