s 93AA Section 93A: interpretation
(1) In section 93A(1), “ safety-critical duty offence ” means— (a) an offence under section 20A; or (b) an offence under section 20(1)(a) in respect of a safety-critical duty (as defined in section 93I). (2) In section 93A(3A) and (3B)— “ aviation function ” means a role or activity in connection with aviation that is specified, or of a description specified, by regulations made by the Defence Council for the purposes of those subsections; “ marine function ” means a role or activity in connection with a ship or ships that is specified, or of a description specified, by regulations made by the Defence Council for the purposes of those subsections. (3) The Defence Council may specify a role or activity (or description of role or activity) under subsection (2) only if carrying it out with ability impaired by alcohol or drugs would result in a risk of— (a) death, (b) serious injury to any person, (c) serious damage to property, or (d) serious environmental harm, but this is subject to subsection (4). (4) The Defence Council's powers under subsection (2) include power to specify a role or activity that is undertaken in preparation for, or in connection with, the carrying out of a role or activity (or description of role or activity) that satisfies the test in subsection (3), either by specifying such a role or activity generally or by specifying a particular role or activity. (5) For the purposes of section 93A(3A) and (3B), an accident does not involve an aircraft or a ship simply because it takes place on an aircraft or ship. (6) In section 93A(3C), references to the carrying out of a safety-critical function are to— (a) the performance by a person subject to service law of a duty specified, or of a description specified, by regulations under section 20A(2) or of any other safety-critical duty (as defined in section 93I); or (b) the carrying out by a person who is a civilian subject to service discipline, in the course of the person's employment, of a role or activity which, if it were carried out by a person subject to service law in the course of his or her duty, would be a safety-critical duty. (7) References in section 93A and this section to a person carrying out a function include a failure by the person to carry out a function at a time when the person is responsible for carrying it out (and related expressions are to be read accordingly).