In the case of every coach (on any train) which has internal doors which slide in the same direction one of the following should be carried out by 31 December 2003: (i) the coach should be fitted instead with opposite- handed internal doors; (ii) the coach should be fitted instead with double leaf internal doors; or (iii) a panel in the door should be rendered removable so as to enable passengers to pass through. The above is subject to the proviso that if the HMRI are satisfied, on application by the TOC concerned, that it is not practicable for that change to be achieved within this period, they may grant a deferment for an appropriate period in which the work is to be done (para 14.28).