13. Staircases

It shall be the duty of the occupier of a workplace to ensure that every staircase in the workplace or every staircase which affords a means of exit from the workplace shall be provided and maintained with a substantial handrail and lower rail or other barrier to prevent any person falling, which -

{a} if the staircase has an open side, shall be on that side; or

{b) if the staircase has two open sides, shall be on both sides.