215 ILCS 165/5
The business and affairs of a health services plan corporation shall be managed by a board of trustees, which shall have the power to adopt, and to amend from time to time, by-laws governing the conduct of the corporation's business. The board of trustees shall consist of not less than seven persons, all of whom shall have the same general qualifications as the incorporators, and at least 30% of whom shall, in addition, be physicians or dentists, licensed in Illinois to practice medicine in all of its branches or dentistry, respectively; provided, however, that if in computing the required number of physicians or dentists on the board of trustees, the amount of 30% does not coincide with a whole number, but lies between whole numbers, the smaller whole number shall be controlling as to the number of physicians or dentists. The original board of trustees shall be appointed by the incorporators. Trustees shall serve for a term of three years, except that as to the original appointed board, not more than one-third of the members thereof shall be appointed for three years, not more than one-third thereof for two years and the balance thereof for one year. As the terms of the members of the board of trustees expire, they shall be replaced, from time to time, by election by the health services plan subscribers who are members of the health services plan corporation. If the corporation furnishes medical services to the plan's subscribers and beneficiaries and these services are rendered by physicians licensed in Illinois to practice medicine in all of its branches, the board of trustees shall appoint a Medical Director who shall be a physician licensed in Illinois to practice medicine in all of its branches. The Medical Director may participate in all deliberations of the board of trustees but shall not vote in any decisions or determinations made by the board of trustees. The Medical Director, under the board of trustees, shall have complete charge of and responsibility for the medical and medically related scientific aspects of the business of the corporation.
215 ILCS 165/5