No person shall obstruct, impede, or interfere with any officer, employee, contractor, or authorized representative of this jurisdiction or with any person who owns or holds any estate or interest in any building which has been ordered repaired, vacated, or demolished under the provisions of this subchapter, or with any person to whom such building has been lawfully sold pursuant to the provisions of this subchapter, whenever such officer, employee, contractor, or authorized representative of the city, person having an interest or estate in such building or structure, or purchaser is engaged in the work of repairing, vacating and repairing, or demolishing any such building, pursuant to the provisions of this subchapter, or in performing any necessary act preliminary to or incidental to such work or authorized or directed pursuant to this subchapter.
(Prior Code, § 8.165) Penalty, see § 150.999