Subject to subsection (2) below, if any person trespasses on any land forming part of an aerodrome licensed in pursuance of an Air Navigation Order F3 or authorised by a certificate under the Aerodromes Regulation, he shall be liable on summary conviction to a fine not exceeding F1level 3 on the standard scale.

No person shall be liable under this section unless it is proved that, at the material time, notices warning trespassers of their liability under this section were posted so as to be readily seen and read by members of the public, in such positions on or near the boundary of the aerodrome as appear to the court to be proper.