7.—(1) A local or foreign enforcement officer shall not be liable in any civil or criminal proceedings for anything done in purported exercise of the powers conferred on him by this Act if the court is satisfied that the act was done in good faith and that there were reasonable grounds for doing it.
(2) Any person who—
(a)without reasonable excuse fails to comply with any requirement imposed, or to answer any question asked, by a local or foreign enforcement officer under this Act;
(b)without reasonable excuse prevents, or attempts to prevent, any other person from complying with any such requirement or answering any such question; or
(c)assaults any such officer while exercising any of the powers conferred on him by or by virtue of this Act or obstructs any such officer in the exercise of any of those powers,
shall be guilty of an offence.
(3) A person guilty of an offence under this section shall be liable on summary conviction in the case of a first offence thereunder to a fine not exceeding £200 and in the case of a second or subsequent offence thereunder to a fine not exceeding £400.