Any person owning or maintaining any elevator for the convenience of the
public or tenants of any building who shall employ any person to operate such
elevator shall furnish and keep in use in such elevator one comfortable and
convenient stool or seat for the use and accommodation of the operator of such
elevator during the time when such person shall be employed in operating the
same. Stools shall also be provided for employees generally known as
elevator starters, and shall be placed in the lobby of such building where such
starters have their stand, while on duty.