From the Minnesota Council of Nonprofits:
Nonprofits have an ethical obligation to their constituents and the public to conduct their activities with accountability and transparency. Nonprofits should regularly and openly convey information to the public about their mission, activities, accomplishments and decision-making processes. Information from a nonprofit organization should be easily accessible to the public and should create external visibility, public understanding and trust in the organization ….
5) Boards of directors should provide information to the public that describes their decisions and decision-making processes. They should make meeting agendas and descriptions of significant decisions available to those who request them.
6) A nonprofit should provide its constituents with ongoing opportunities to interact with the board and management regarding its activities.