From a conjoint reading of the entire scheme of the Act, 1957 and the Rules 1987 framed thereunder, it is evident that the Head constables are referred as 'Enrolled members of the Force'. The deployment/ distribution of the enrolled members of the Force, at the entry level i.e. on the post of constables is made separately in the zonal railways (known as the Railway Protection Force) and a Special trained reserve force known as the Railway Protection Special Force. And the transfer from one zonal railway to another or i.e. from Railway Protection Force to Railway Protection Special Force or vice-versa is not ordinarily permissible. On the transfer made on request, the enrolled member of the Force will loose his seniority and is to be kept at the bottom of the seniority list of enrolled members of the Force of that unit, at the zonal railway or the Railway Protection Special Force. The “relevant rank” of the enrolled members of the Force, however, would not change i.e. upon transfer on request, the transferred enrolled member of the Force shall be kept in the seniority list of the relevant rank of that Railway (zonal railway) or the Railway Protection Special Force, at the bottom of all existing confirmed and officiating enrolled members of that force, irrespective of the length of his service.