The liquid fuel measurement systems in use must undergo a scheduled verification regularly and when needed. The scheduled verification interval according to the Inspection of Weights and Measures Act is two years. Verifications are performed by inspection bodies approved by Tukes (in Finnish).
The inspection body is entitled to receive the information necessary for the scheduled verification from the owner, distributor or manufacturer of the measuring instrument. As for the liquid fuel measuring systems in accordance with MID, the website maintained by WELMEC may be helpful when acquiring information.