The container identification number to be recorded on the fumigation certificate. The exterior of the container to be inspected to ensure it is structurally sound and in good condition – with no significant distortion. Its sides and roof must be sound and free of significant holes, tears or gaps. Where rust is present the affected areas to be closely inspected and probed for holes. Containers with holes, gaps or those that are badly rusted are not suitable for pressure testing. The doors must make firm contact with each other, the door frame and floor sill so that their seals function effectively. The rubber seals around the doors should be unbroken, leaving no obvious gaps. Containers with faulty doors and door seals are unsuitable for pressure testing. The interior of the  container should be inspected from inside, with the doors closed.