Every authorized health maintenance organization, upon canceling, denying, or refusing to renew any individual health maintenance agreement, shall, upon written request, directly notify in writing the applicant or enrolled participant as appropriate, of the reasons for the action by the health maintenance organization. Any benefits, terms, rates, or conditions of such agreement which are restricted, excluded, modified, increased, or reduced shall, upon written request, be set forth in writing and supplied to the individual. The written communications required by this section shall be phrased in simple language which is readily understandable to a person of average intelligence, education, and reading ability.