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  (4) As used in this Section:

    (a) "corporation" does not include an entity organized as or by a governmental agency for the execution of a governmental program;

    (b) "agent" means any director, officer, servant, employee or other person authorized to act in behalf of the corporation or association and, in the case of an unincorporated association, a member of such association;

    (c) "high managerial agent" means an officer of a corporation or an unincorporated association, or, in the case of a partnership, a partner, or any other agent of a corporation or association having duties of such responsibility that his conduct may fairly be assumed to represent the policy of the corporation or association.

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