The Rulebook on hydrometer certification was published in the “Official Gazette of the RS”, No. 21/2026 of January 30, 2026.

This rulebook prescribes the manner and conditions of the first, periodic and extraordinary verification of hydrometers, as well as special purpose hydrometers, the requirements that the hydrometer must meet during verification, as well as the method of determining the fulfillment of those requirements.

This Rulebook enters into force on March 14, 2026, and on the day of its entry into force, the Rulebook on Hydrometers ("Official Gazette", No. 66/14) ceases to be valid.