The provisions of this subchapter define off-campus educational units, establish criteria and procedures applicable to the classification, authorization, operation, and reclassification of these units and establish the supply/demand pathway as a developmental approach to providing access which allows for the gradual increase of resources as demand grows. The provisions of this subchapter are applicable to all units of public senior colleges, universities and health-related institutions which offer instruction for credit but are geographically separate from their institutions' main campuses.