3.—(1) This regulation applies to:—
(a)ignition apparatus forming part of an internal combustion engine other than an engine which forms part of an aircraft or of a foreign vessel, except ignition apparatus which is proved by the person using it to have been assembled as part of a vehicle, vessel or engine before the date on which these regulations come into operation; and
(b)apparatus which includes one or more components designed to form part of the ignition apparatus of an internal combustion engine, and which is assembled for the purpose of testing or demonstrating the operation of one or more of those components, and which when used involves sudden changes of current in a high-voltage circuit.
(2) The requirement referred to in regulation four shall be complied with in the case of any apparatus to which this regulation applies, if the apparatus is to be used within the United Kingdom or the territorial waters adjacent thereto:—
(a)on land, or
(b)on the sea or in any estuary, within one hundred yards of any moored vessel or on the landward side of a line one hundred yards to seaward of low water mark, or
(c)on any water, other than the sea or an estuary:
(i)that suppressors were fitted to the apparatus by the manufacturer or builder of the vehicle, vessel or engine of which the apparatus forms part or by the importer of that vehicle, vessel or engine into the United Kingdom, and
(ii)that the suppressors so fitted remained fitted to the apparatus at the time of the use, or that suppressors having the same electrical characteristics had been correctly fitted to the apparatus at that time in substitution for those fitted as aforesaid, and in either case that the suppressors were then in good electrical and mechanical repair and condition, and
(iii)that the apparatus at the time of the use consisted of the same components as those which were fitted at the time when the vehicle, vessel or engine was manufactured or built, or that any components which had been substituted for those components had the same electrical characteristics and had been correctly fitted.