At January the 8th, 1997, National Standard Institute (INN), published “Certificación de Conformidad - Modelos de Certificación ISO/CASCO, INN 100-611” Which is a translation of the original text in English “Technical Assessment and verification of conformity to standards and specifications”, in this document eight certification models are described:

• Type Testing
• Type Testing + Open Market Samples Test
• Type Testing + Factory Samples Test
• Type Testing + Open Market and Factory Samples Test
• Conformity Brand Certification (Quality Seal)
• Factory Quality control assessment and its acceptance only