Regulation 8 Exemptions relating to the distribution or sale of motor fuel
Regulations 6 and 7 do not apply to the distribution or sale of motor fuel for the purposes of tests or experiments in connection with—
the composition or content of motor fuel; or
the design or performance of any article which uses, or is intended to use, motor fuel, or any component or lubricant of such article, in a case where the composition or content of the fuel is relevant to such design or performance.
Regulations 6 and 7 do not apply to the distribution or sale of motor fuel—
for use in an aircraft (other than a hovercraft);
for use in a vehicle constructed or adapted for use solely in competitions or trials; or
which is in the course of being manufactured or blended.
Nothing in regulation 6 or 7 shall render it unlawful for a person to distribute or sell any motor fuel on the grounds that it fails to comply with any requirements mentioned in those regulations if—
the failure is due to a mistake or to reliance on information supplied to him or to the act or default of another person, accident or some other cause beyond his control; and
the person in question has taken all reasonable precautions and exercised all due diligence to avoid such failure by himself or any person under his control.