THE RAILWAYS ACT, 1989 – Chapter XV – Section 139

139. Power to Remove Persons
Any person failing or refusing to pay the fare and the excess charge referred to in section 138 may be removed by any railway servant authorized in this behalf who may call to his aid any other person to effect such removal;
Provided that nothing in this section shall be deemed to preclude a person removed from a carriage of a higher class from continuing his journey in a carriage of a class for which he holds a pass or ticket;
Provided further that a woman or a child if unaccompanied by a male passenger, shall not be so removed except either at the station from where she or he commences her or his journey or at a junction or terminal station or station at the headquarters of a civil district and such removal shall be made only during the day.

Forward reference⇒ Section 140