(1) This section applies for the purposes of sections 1 and 2 in relation to cases where-

(a) a statement is published or caused to be published in the course of, or in connection with, the provision or use of a service provided electronically; or

(b) conduct falling within section 2(2) was in the course of, or in connection with, the provision or use of such a service.

(2) The cases in which the statement, or the article or record to which the conduct relates, is to be regarded as having the endorsement of a person ("the relevant person") at any time include a case in which-

(a) a constable has given him a notice under subsection (3);

(b) that time falls more than 2 working days after the day on which the notice was given; and

(c) the relevant person has failed, without reasonable excuse, to comply with the notice.

(3) A notice under this subsection is a notice which-

(a) declares that, in the opinion of the constable giving it, the statement or the article or record is unlawfully terrorism-related;