In this Act "special procedure material" means—
Subject to the following provisions of this section, this subsection applies to material, other than items subject to legal privilege and excluded material, in the possession of a person who—
Where material is acquired—
it is only special procedure material if it was special procedure material immediately before the acquisition.
Where material is created by an employee in the course of his employment, it is only special procedure material if it would have been special procedure material had his employer created it.
Where material is created by a company on behalf of an associated company, it is only special procedure material if it would have been special procedure material had the associated company created it.
A company is to be treated as another's associated company for the purposes of this section if it would be so treated under section 449 of the Corporation Tax Act 2010.