The original Model Nonprofit Corporation Act was approved by the ABA Business Law Section Corporate Laws Committee in 1952 and has evolved with revisions and updates by the Nonprofit Organizations Committee. The MNCA is a model set of statutes governing nonprofit corporations proposed for adoption by state legislatures. This updated Fourth Edition contains many changes that follow the updated provisions and revised official comments in the 2016 revision of the Model Business Corporation Act, along with a variety of other changes. New provisions in the Fourth Edition include the ability to renounce in advance corporation opportunities, procedures to ratify defective corporate actions and records, and the validity of forum selection bylaws. While it includes important new provisions, the Fourth Edition also stands in direct continuity with prior versions and continues the substantive approach of the Third Edition.

A general nonprofit corporation statute must be designed to provide rules for all types of nonprofit corporations from large hospital systems to small human services nonprofits to country clubs and to the other thousands of nonprofit corporations that exist in each state. Besides following the MBCA as much as possible, the MNCA provides as much flexibility as possible to nonprofit corporations as to how they are structured and governed. The Fourth Edition continues to provide great flexibility for nonprofit corporations to organize and operate in what they believe to be the most efficient and effective manner.