1. In this Schedule—
“an accredited testing laboratory” means a testing laboratory which has been accredited by the United Kingdom Accreditation Service or by an equivalent body in another EEA State under European Standard EN 45001 : 1989 for general criteria for the operation of testing laboratories (British Standard BS 7501 : 1989);
“articulating connector” means a connector bridging the space between two separate and rigid vehicle structures;
“bar” means bar gauge;
“BS 5430 : Part I : 1990” means—
Part I of the British Standard for the periodic inspection, testing and maintenance of transportable gas containers (excluding dissolved acetylene gas containers), published by the British Standards Institution under the reference BS 5430 : Part I : 1990; or
any equivalent standard published by a recognised testing body in another EEA State;
and, in a case falling within paragraph (b), a reference in this Schedule to any particular provision of the British Standard is to be taken as a reference to the equivalent provision of any such EEA equivalent standard;
“compressed natural gas” means natural gas stored at a pressure above 30 bar;
“design pressure” means the pressure that a part of a gas propulsion system has been designed to withstand;
“gas container” means a container for gas falling within paragraph 2(1);
“g” means gravity;
“high pressure” means a pressure exceeding 7 bar;
“large bus” means a vehicle constructed or adapted to carry more than 16 seated passengers in addition to the driver;
“low pressure” means a pressure not exceeding 75 millibars;
“medium pressure” means a pressure not exceeding 7 bar but exceeding 75 millibars; “millibars” means millibars gauge;
“mm” means millimetres;
“mm2” means square millimetres;
“N” means newtons;
“°C” means degrees Celsius;
“pipeline” means any pipe or passage connecting any two parts of a gas propulsion system;
“pressure relief device” means a device to protect a gas container against over-pressure; and
“regulator” means a device that automatically reduces and controls the pressure of the gas flowing through it.