Section 66

Every passage or corridor leading from an exit to the auditorium to a final space of exit from the building shall be of such width as will in the opinion of the authority, enable the persons who are likely to use it in an emergency to leave the building without danger of creating congestion. At no point shall any such passage or corridor be less than 1.5 m wide and it shall not diminish in width in the direction of the final place of exit.