The department shall determine the fair market rental rate for leases to nonprofit television reception improvement districts. It is the intent of the legislature to appropriate general funds to pay a portion of the rent charged to nonprofit television reception improvement districts. It is the further intent of the legislature that such a lessee pay an annual lease rent of fifty percent of the fair market rental rate, as long as there is a general fund appropriation to compensate the trusts for the remainder of the fair market rental rate.