 NCHL also established an invitational symposium and national leadership award dinner, which is held every November in Chicago.In the mid-2000s NCHL, in collaboration with the accrediting body ACEHSA, supported the evolution of graduate healthcare management education from a knowledge-based to a competency-based approach.By 2007, competency-based education had become an established part of the accreditation process, and was expanded further in the 2013 revision of the accrediting guidelines.