163.Subsection (3) defines "reasonably practicable" for the purpose of this section. The definition includes factors such as how long the determination or separation would take if carried out on the premises (e.g. where there was a large bulk of material) or whether carrying out the determination or separation on premises would prejudice the use of the material to be seized (e.g. where quickly printing off computer material rather than imaging a hard drive could lead to other relevant material on that computer being altered or damaged.) Subsection (4) excludes section 19(6) of PACE where material is seized under subsection (2). Section 19(6) (and its Northern Irish equivalent) prevent a constable seizing material he has reasonable grounds to believe is legally privileged. In other words Subsection (4) means that where the constable cannot separate out the item he is able to seize from an item which is legally privileged he is able to remove both from the premises, e.g. where they are both on a computer disc. Subsection (5) sets out the powers of seizure to which section 50 will apply. One of these powers is s.28(2)(b) of the Competition Act 1998. This gives a power to take copies but not to take originals of documents. Subsection (6) means that whilst section 50 applies to that power it only enables those exercising it to copy material in order to examine it elsewhere to determine or separate out what in fact they would be entitled to copy under s.28 itself. It does not give them the power to seize original documents.