What is the fine-grained topic of the following text: The Minister of Mines, Industry and Technological Development, informs the public, the operators and the owners of pressure vessels that the following companies, holders of an approval to the controls, expertise and regulatory checks of pressure vessels gas and water vapor pressure, comply with the provisions of decree N ° 99/819 / PM of November 9, 1999 setting the conditions of approval of natural or legal persons to the controls, expertise and regulatory audits of pressure vessels of gas and water vapor pressure. Only return the topic.
Approval of companies for control and regulatory checks of pressure vessels