From time to time, as the work of construction in the factory progresses and whenever the Department of General Services requires, the certified architect or structural engineer in responsible charge of the supervision of the work of construction in the factory, the inspector on the work, and the manufacturer shall each make to the Department of General Services a report, duly verified by him or her, upon a form prescribed by the Department of General Services, showing, of his or her own personal knowledge, that the work during the period covered by the report has been performed, and materials used and installed, in every particular, in accordance with the approved plans and specification, setting forth such detailed statements of fact as are required by the Department of General Services.