(a) whether many of the stalls allotted on railway stations have been rented out or sold by original allottees to other persons and the authorities concerned have not taken any action in this regard;
(b) if so, the zone-wise details of such cases detected and the action taken thereon;
(c) the nature of the action taken; and
(d) the provisions to ensure the rule-based running of stalls and the machinery put in place to implement these provisions?