The Open Meetings Act (OMA) is designed to ensure that Illinois residents have access to their government. What is the difference between a Board of Directors and a Board of Managers?In the context of associations, these terms are frequently used interchangeably. All school board members should be familiar with the requirements of the Open Meetings Act (OMA). The member must file a copy of the certificate of completion with the public body. • New members must complete within 90 days.