According to the order of the Director General of the Uzbek Agency for Technical Regulation under the Ministry of Investment and Foreign Trade of the Republic of Uzbekistan dated November 13, 2022 No. 05-1481, the state standard O'Z DSt ISO 21426:2022 (ISO 21426:2018, IDT) "Tourism and related services. Spa treatment. Requirements for services".

This standard establishes requirements for the provision of quality services in health resorts using natural healing waters (except sea water) and other natural resources.