s 4 Additional smoke-free places
(1) The Secretary of State may make regulations designating as smoke-free any place in England or description of place in England that is not smoke-free under section 2. (2) The place, or places falling within the description, need not be enclosed or substantially enclosed. (3) The Secretary of State may designate a place or description of place under this section only if in the Secretary of State's opinion there is a significant risk that, without a designation, persons present there would be exposed to significant quantities of smoke. (4) The regulations may provide for such places, or places falling within the description, to be smoke-free only— (a) in specified circumstances, (b) at specified times, (c) if specified conditions are satisfied, (d) in specified areas, or any combination of those.