In addition to other grounds specified in this Act, the Department shall refuse to issue and shall suspend the license of any lottery sales agency who fails to file a return, or to pay the tax, penalty or interest shown in a filed return, or to pay any final assessment of tax, penalty or interest, as required by any tax Act administered by the Department of Revenue, until such time as the requirements of any such tax Act are satisfied, unless the agency is contesting, in accordance with the procedures established by the appropriate revenue Act, its liability for the tax or the amount of tax. The Department shall affirmatively verify the tax status of every sales agency before issuing or renewing a license. For purposes of this Section, a sales agency shall not be considered delinquent in the payment of a tax if the agency (a) has entered into an agreement with the Department of Revenue for the payment of all such taxes that are due and (b) is in compliance with the agreement.