Section 6-1110 - Collection and return of spent units by institutional user(a) Each institutional user shall collect and return spent units used in its operations to the appropriate responsible entity in accordance with the unit management program, or, at its discretion, to a facility permitted to store or process hazardous waste.(b) A rechargeable product designed for use by an institutional user shall bear a notice that when no longer usable, the product shall be recycled or disposed of properly.