Section 4. Benefits. The Trustees shall have full authority to determine the form, nature and amount of benefits to be provided and the rules of eligibility therefor and the effective dates thereof except that said benefits must be limited to one or more of the following: death, accidental death, injury, disability, hospitalization, surgical expenses and medical expenses, and any other similar types of benefits permitted by law to be paid from the Health Fund; and said benefits shall in no event include any pension benefits.