(h) "Plan Sponsor" means any person other than an insurer, who establishes or maintains a plan covering residents of this State, including but not limited to plans established or maintained by 2 or more employers or jointly by one or more employers and one or more employee organizations, the association, committee, joint board of trustees, or other similar group of representatives of the parties who establish or maintain the plan. Provided, however, that "Plan Sponsor" shall not include:
(1) The employer in the case of a plan established or maintained by a single employer; or(2) The employee organization in the case of a plan established or maintained by an employee organization. No plan sponsor covered in whole by provisions of the Employee Retirement Income Security Act of 1974 (ERISA) shall be covered by any of the provisions of this Act to the extent that such provisions are inconsistent with or in conflict with any provisions of ERISA as now or hereafter amended.