6. A pension plan is a contract under which retirement benefits are provided to the member, under given conditions and at a given age, the funding of which is ensured by contributions payable either by the employer only, or by both the employer and the member.
Every pension plan, with the exception of insured plans, shall have a pension fund into which, in particular, contributions and the income derived therefrom are paid. The pension fund shall constitute a trust patrimony appropriated mainly to the payment of the refunds and pension benefits to which the members and beneficiaries are entitled.