What makes a requirement binding here
NOM-059-SSA1-2015, “Buenas prácticas de fabricación de medicamentos”, published in the Diario Oficial de la Federación on 5 February 2016. A Norma Oficial Mexicana is the instrument through which technical requirements acquire force in Mexico, and this is the one that carries good manufacturing practice for medicines. Note the two dates that appear on it and are routinely conflated: 2015 is the norm’s own designation year, and 05/02/2016 is the date of publication in the DOF.
Through the norm itself, administered by the Comisión Federal para la Protección contra Riesgos Sanitarios — COFEPRIS, the Federal Commission for the Protection Against Sanitary Risks. A NOM is mandatory in a way a guidance document is not: it is the binding technical rule, and compliance is assessed against its text rather than against an inspector’s interpretation of a general principle. COFEPRIS has been a PIC/S Participating Authority since January 2018.