series of tests and visual examinations, also carried out by an official of the legal metrology service (inspector), to ascertain whether the weights or weight set, having been in use for some time since the previous verification, continues to conform to, or again conforms to, regulations and maintains its metrological characteristics within the required limits. If the weights or weight set passes all tests and examinations, its legal character is either confirmed, or re-established by its acceptance as evidenced by stamping and/or the issuing of a certificate of verification. When sampling is used to verify a population of weights, all elements in the population will be deemed verified