TSA Alternative. If waivers or opt-outs are allowed by the carrier or carriers o the medical plans currently in effect an alternative for fully paid health plan is offered to allow employees to cancel their own fully paid health plan paid by the District and contribute up to 70% of the cost of the lowest cost composite health plan provided by the District to a Tax Shelter Annuity ("TSA"). The remaining 30% of the savings would be placed in a pool the use of which will be determined by employees through negotiations with the District. This alternative is only open to those who have health coverage other than the plan provided to them by the District and each employee who elects this alternative must stipulate that he/she has health coverage through another source.