Institute of Metrology, Quality and Technology - INMETRO issued Ordinance no. 436, 19 October 2021, that approves the Regulation for Cylinders for Vehicular Natural Gas (GNV), which includes the Mercosur Technical Regulation, approved by Resolution of the Common Market Group - GMC 3/2008, 16 April 2008, on the Conformity Assessment Requirements and Specifications for the Conformity Identification Seal, respectively, in annexes I, II and III of this Ordinance. Inmetro Ordinance 436 revokes the following acts on the dates stated: I - Inmetro Ordinance 171, 28 August 2002, published in the Federal Official Gazette on 2 September 2002, section 1, pages 85 to 86, to be revoked on 31 December 2023; II - Inmetro Ordinance 143, 6 August 2004, published in the Federal Official Gazette on 10 August 2004, section 1, page 69, to be revoked on 31 December 2023; III - Items A.4 and A.5 of Inmetro Ordinance 231, 28 September 2006, published in the Federal Official Gazette on 2 October 2006, section 1, page 91, to be revoked on 30 June 2023; and IV - Inmetro Ordinance 298, 21 August 2008, published in the Federal Official Gazette on 25 August 25 2008, section 1, page 85, revoked on the date the Ordinance presently notified was published.