In the "Official Gazette of RS", number 41/21 of April 23, 2021, the Rulebook on the road and railway tanks with level measurement was published. This Rulebook prescribes in more detail the requirements for road and railway tanks with level measurement, their marking, documentation, method of determining the fulfillment of requirements, measurement methods, method of testing the type of road and railway tanks with level measurement, as well as the manner and conditions of verification of these tanks.