EU Directive Making available on the market of measuring instruments, ann. II, mod. A2, para. 4 (2014/32/EU, recast 2014-02)
At the choice of the manufacturer, either an accredited in-house body or a notified body, chosen by the manufacturer, shall carry out instrument checks or have them carried out at random intervals determined by the body, in order to verify the quality of the internal checks of the instrument, taking into account, inter alia, the technological complexity of the instruments and the quantity of production.