11. A British sea-fishery officer, or a person assisting such an officer by virtue of article 8(2) or 9(1)(b) or (3), is not liable in any civil or criminal proceedings for anything done in the purported exercise of the powers conferred by article 8, 9 or 10 if the court is satisfied that—
(a)the act was done in good faith;
(b)there were reasonable grounds for doing it; and
(c)it was done with reasonable skill and care.