The Central Government may, within such time as may be specified by it or within such further time, as it may grant, require that--
(a) boundary marks or fences be provided or renewed by a railway administration for a railway or any part thereof and for roads constructed in connection therewith;
(b) suitable gates, chains, bars, stiles or hand-rails be erected or renewed by a railway administration at level crossings;
(c) persons be employed by a railway administration to open and shut gates, chains or bars.