“Article 123 of the LIE states that they are the Suppliers; Qualified Users Participating in the Market; the End Users supplied by the isolated supply; as well as the holders of the Legacy Interconnection Contracts that include Load Centers that do not cover their consumption entirely by Clean Energies; They are of a public or private nature who will be subject to compliance with the obligations of Clean Energies. The above subjects are known as the Mandatory Participants.” Source: https://www.gob.mx/cre/articulos/preguntas-frecuentes-sobre-los-certificados-de-energias-limpias