Certification is carried out in accordance with the Labor Code of the Republic of Kazakhstan according to the Rules of mandatory periodic certification of production facilities according to working conditions, approved by the Decree of the Government of the Republic of Kazakhstan on March 31, 2015 for No. 185. All production facilities of organizations operating in Kazakhstan are subject to certification. The terms of certification are established by the organization based on changes in the conditions and nature of work, but at least once every 5 years from the date of the last measurements. Hazardous and harmful production factors (physical, chemical, biological, technological), including the severity and intensity of work, are subject to assessment according to working conditions. Measurements of parameters of hazardous and harmful production factors, determination of indicators of the severity and intensity of the labor process, occupational hygiene at work are carried out in the manner and in the amounts provided for by sanitary rules, hygienic standards approved in accordance with paragraph 6 of Article 144 of the Code of the Republic of Kazakhstan dated September 18, 2009 On the health of the people and the health system.