As of May 1, 2010, Mexico will institute new processing requirements for each immigration category.
Some of the most relevant changes include:

• All migratory forms for tourists, business visitors and technical visitors with lucrative activities, who intend to stay in Mexico for up to 180 days, will be replaced by a single “FMM” form (“Forma Migratoria Multiple”)
• The recipient of the FMM will be classified as either Business (Visitante Persona de Negocios); Visitor with Lucrative Activities (Visitante con Actividades Lucrativas) or Visitor with Non Lucrative Activites (Visitante con Actividades No Lucrativas) which will allow the foreign national to visit Mexico for businesses.
• If the business visit extends for more than 180 days, the foreign national will have to file for a change of Immigration status to obtain the correspondent FM3.
• New migration cards will replace the FM2 and FM3 booklets.