F1Where the approval authority has granted a GB type-approval, it must take the necessary measures in accordance with Annex IV to verify F2..., that the manufacturer produces the vehicles, systems, components or separate technical units in conformity with the approved type.

F3Where the approval authority has granted a GB whole-vehicle type-approval, it must verify a statistically relevant number of samples of vehicles and certificates of conformity on their compliance with Articles 36 and 37 and shall verify that the data in those certificates of conformity are correct.

F4Where the approval authority has granted a GB type-approval, it must take the necessary measures to verify F5..., that the arrangements referred to in paragraphs 1 and 2 of this Article continue to be adequate so that vehicles, systems, components or separate technical units in production continue to conform to the approved type and that certificates of conformity continue to comply with Articles 36 and 37.

In order to verify that a vehicle, system, component or separate technical unit conforms to the approved type, the approval authority F6... shall take the necessary measures to carry out the checks or tests on samples taken at the manufacturer's premises, including production facilities that are required for F7GB  type-approval.

In accordance with Annex IV, the approval authority shall take the necessary measures to carry out such checks or tests with the frequency set out in the regulatory acts listed in Annex II, or, if no frequency is specified in those acts, at least once every three years.

F8Where the approval authority has granted a GB type-approval, it must take the necessary measures to verify that the manufacturer complies with the obligations set out in Chapter XIV. It shall verify in particular whether, in order to comply with those obligations, the manufacturer has amended or supplemented the vehicle OBD information and vehicle repair and maintenance information.

F9Where the approval authority has granted a GB type-approval and establishes that the manufacturer no longer produces the vehicles, systems, components or separate technical units in conformity with the approved type or with the requirements of this Regulation, or establishes that the certificates of conformity no longer comply with Articles 36 and 37, even though production is continued, it shall take the necessary measures to ensure that the arrangements for conformity of production are followed correctly or withdraw the type-approval. The approval authority may decide to take all necessary restrictive measures in accordance with Chapter XI.

The Secretary of State may by regulations amend Annex IV to take account of technological and regulatory developments by updating the conformity of production procedures.