(1)Any person contravening any byelaws made under section 63 shall be liable on summary conviction to a fine not exceeding such amount as, subject to subsection (2) of this section, may be specified by the byelaws in relation to the contravention.
(2)The maximum fines that byelaws may specify by virtue of subsection (1) are fines of an amount at the fourth level on the standard scale or of a lower amount.
(3)Where any person other than the Secretary of State has made any byelaw in relation to any airport by virtue of section 63(2)(b), the Secretary of State may, after consulting that person, by order—
(a)revoke or vary that byelaw if the Secretary of State considers it appropriate to do so by reason of his having designated the airport for the purposes of section 78 of the 1982 Act (regulation of noise and vibration from aircraft); or
(b)revoke or vary that byelaw to the extent that it appears to the Secretary of State to be inconsistent with the safety of persons or vehicles using the airport, of aircraft or of the general public or to be inconsistent with any international obligation of the United Kingdom.