The notice to provide fire escapes shall be in writing and shall be served on the owner, trustees, lessee or occupant of any building not provided with fire escapes in accordance with the provisions of this Act, commanding such owner or owners, trustees, lessee or occupant, or either of them, to place or cause to be placed upon such building or buildings, such fire escape or escapes, within thirty (30) days after the service of such notice.
425 ILCS 15/3