"Public body" means any legislative, executive or judicial body, agency, office, department, authority, post, commission, committee, institution, board or political subdivision created by law to exercise some sovereign power or to perform some governmental duty, and empowered by law to undertake the activities described in this chapter. A public body is defined by §2.2-4301 and §2.2-2012 of the Code of Virginia and also includes private institutions of higher education. Please click the following links for additional information: