(1) This section applies to an act done in the reasonable belief that the act is in compliance with -
(a) regulations under section 1, or
(b) directions given by virtue of section 6 or 7.
(2) A person is not liable to any civil proceedings to which that person would, in the absence of this section, have been liable in respect of the act.
(3) In this section "act" includes an omission.