Accreditation is a process that goes beyond  mere recognition or approval which usually a regulator does in any country. Accreditation is usually voluntary taken up with the assistance of  peers  with the idea of continuously improving he quality of the campuses. 

The accreditation agency's role is to assess the situation on the ground first  which is usually done by the institution itself based on certain parameters laid down by the agency by way of certain itinerant standards or procedures. 

Accreditation grows the school and any system that does not promise to help grow the school from point A to point B  and keep it growing with the same momentum is not work the money to pay for or the time needed to spend for such process. Mere  endorsement of as is where is quality  is not the purpose of accreditation which is what the regulator does in the first place by way of licensing or giving permission to open the business. 

There are generally two different types of accreditation agencies, namely local accreditation agencies and international accreditation agencies. By definition, local agencies deal with the   the norms and compliance of regulations in a given market or region while the international accreditors  look beyond the local norms  and certify the institutions having achieved globally accepted norms of quality