4.The Contracting Parties, accepting such certificates, shall approve authorised weighing stations to fill in, together with the operator/driver of the goods road vehicle, the International Vehicle Weight Certificate in accordance with the following minimum requirements:U.K.
Weighing stations shall be equipped with certified weighing instruments. For performing the weight measurements, the Contracting Parties accepting such certificates may select the method and instruments they consider appropriate. The Contracting Party accepting such certificates shall ensure the competence of the weighing stations by, for example, an accreditation or assessment process and shall ensure to use of appropriate weighing instruments, the deployment of qualified personnel, and the existence of properly documented quality control systems and testing procedures.
The weighing stations and their instruments shall be well maintained. The instruments shall be regularly verified and sealed by the relevant authorities responsible for weights and measures. The weighing instruments, their maximum permissible errors and usage shall comply with the Recommendations established by the International Organisation for Legal Metrology (OIML).
Weighing stations shall be equipped with weighing instruments corresponding to either:
OIML Recommendation R 76 ‘Non-automatic weighing instruments’ accuracy Class III or better,
OIML Recommendation R 134 ‘Automatic instruments for weighing road vehicles in motion’, accuracy Classes 2, or better, higher error values may apply in case of individual axle weight measurements.