Certification is a set of standards developed and defined by PSIA-AASI National. These standards are divided into five disciplines (alpine, snowboard, cross country, telemark, adaptive). Each of the 8 divisions follows these guidelines but can customize their own process to suit the individual needs of their division. Certification is not required in order to work as a snowsports instructor or to be a member of PSIA-AASI. However, most instructors choose to pursue certification in order to be recognized by snowsports schools across the country, which often pay more for certified instructors. Membership and certification can include benefits such as professional discounts on equipment, clothing and accessories.