WTO notification · TBT
MexicoUpdated: check whether it is now adopted or in force
Draft Official Mexican Standard PROY-NOM-251-SE-2025, Construction industry-Iron and steel products-Specifications, test methods and commercial information (cancels PROY-NOM-251-SE-2021).
Proyecto de Norma Oficial Mexicana PROY-NOM-251-SE-2025, Industria de la construcción-Productos de hierro y acero-Especificaciones, métodos de prueba e información comercial (cancela el PROY-NOM-251-SE-2021).
Mexico issued an addendum on 25 February 2026 to the earlier TBT notification G/TBT/N/MEX/545. Addenda often report that a measure was adopted, changed, postponed or withdrawn. The measure was first notified on 16 July 2025. The comment period closed on 14 September 2025.
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Published here:
Updated here:
iron and steel products manufactured, imported and/or marketed in national territory, intended for a construction or building work
Aplica a los productos de hierro y acero que se fabriquen, importen y/o comercialicen en territorio nacional, destinados a una obra en construcción o edificación
The comment period closed on 14 September 2025. You can still raise concerns about the measure with your country's WTO TBT enquiry point, quoting the document symbol G/TBT/N/MEX/545/Add.1; it can take them up with Mexico.
Find your country's enquiry point on WTO ePing (opens in a new tab)Latest notice (G/TBT/N/MEX/545/Add.1, 25 February 2026)
Draft Mexican Official Standard PROY-NOM-251-SE-2025: Construction industry - Iron and steel products - Specifications, test methods and commercial information (cancels PROY-NOM-251-SE-2021)
Please be advised of the publication, as a definitive standard, of NOM-251-SE-2025: Construction industry - Steel products - Specifications, test methods and commercial information.The text is available for consultation at: This information can be provided by including a website address, a PDF attachment, or other information on where the text of the final/modified measure and/or interpretative guidance can be obtained.
This Draft Official Mexican Standard establishes the specifications, test methods, commercial information and the Conformity Assessment Procedure for iron and steel products for the construction sector that are manufactured, imported and/or marketed in the national territory to provide safety to the user of these products. It applies to iron and steel products that are manufactured, imported and/or marketed in the national territory, listed in Chapter 4, in Table 1 of this Draft Official Mexican Standard, intended for a construction or building work. This Draft Official Mexican Standard does not apply to steel products that are used in buildings or constructions and that are not considered in Table 1.
Este Proyecto de Norma Oficial Mexicana establece las especificaciones, métodos de prueba, la información comercial y el Procedimiento de Evaluación de la Conformidad, para los productos de hierro y acero para el sector de la construcción que se fabriquen, importen y/o comercialicen en territorio nacional para proporcionar seguridad al usuario de estos productos. Aplica a los productos de hierro y acero que se fabriquen, importen y/o comercialicen en territorio nacional, enlistados en el Capítulo 4, en la Tabla 1 de este Proyecto de Norma Oficial Mexicana, destinados a una obra en construcción o edificación. Este Proyecto de Norma Oficial Mexicana no aplica a productos de acero que se empleen en edificaciones o construcciones y que no estén considerados en la Tabla 1.
Every notice about this measure published here, newest first. Each one is the notifying member's own text.
AddendumG/TBT/N/MEX/545/Add.1
Draft Mexican Official Standard PROY-NOM-251-SE-2025: Construction industry - Iron and steel products - Specifications, test methods and commercial information (cancels PROY-NOM-251-SE-2021)
Please be advised of the publication, as a definitive standard, of NOM-251-SE-2025: Construction industry - Steel products - Specifications, test methods and commercial information.The text is available for consultation at: This information can be provided by including a website address, a PDF attachment, or other information on where the text of the final/modified measure and/or interpretative guidance can be obtained.
Regular notificationG/TBT/N/MEX/545
Comment deadline: Closed on 14 September 2025
Draft Official Mexican Standard PROY-NOM-251-SE-2025, Construction industry-Iron and steel products-Specifications, test methods and commercial information (cancels PROY-NOM-251-SE-2021).
Proyecto de Norma Oficial Mexicana PROY-NOM-251-SE-2025, Industria de la construcción-Productos de hierro y acero-Especificaciones, métodos de prueba e información comercial (cancela el PROY-NOM-251-SE-2021).
This Draft Official Mexican Standard establishes the specifications, test methods, commercial information and the Conformity Assessment Procedure for iron and steel products for the construction sector that are manufactured, imported and/or marketed in the national territory to provide safety to the user of these products. It applies to iron and steel products that are manufactured, imported and/or marketed in the national territory, listed in Chapter 4, in Table 1 of this Draft Official Mexican Standard, intended for a construction or building work. This Draft Official Mexican Standard does not apply to steel products that are used in buildings or constructions and that are not considered in Table 1.
Este Proyecto de Norma Oficial Mexicana establece las especificaciones, métodos de prueba, la información comercial y el Procedimiento de Evaluación de la Conformidad, para los productos de hierro y acero para el sector de la construcción que se fabriquen, importen y/o comercialicen en territorio nacional para proporcionar seguridad al usuario de estos productos. Aplica a los productos de hierro y acero que se fabriquen, importen y/o comercialicen en territorio nacional, enlistados en el Capítulo 4, en la Tabla 1 de este Proyecto de Norma Oficial Mexicana, destinados a una obra en construcción o edificación. Este Proyecto de Norma Oficial Mexicana no aplica a productos de acero que se empleen en edificaciones o construcciones y que no estén considerados en la Tabla 1.
Expodite writes its summary from the official record. The notification and the documents it notifies are on the WTO's own websites.
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