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registration that is issued to the applicant under this Act will permit the applicant to engage in business without registering separately under such other law, ordinance or resolution, but the amount of the security required by the Department shall not exceed three times the amount of the applicant's average monthly tax liability, or $50,000.00, whichever amount is lower. No certificate of registration under this Act shall be issued by the Department until the applicant provides the Department with satisfactory security, if required, as herein provided for. Upon receipt of the application for certificate of registration in proper form, and upon approval by the Department of the security furnished by the applicant, if required, the Department shall issue to such applicant, in the manner and form determined by the Department, a certificate of registration which shall permit the person to whom it is issued to engage in the business of selling tangible personal property at retail in this State. The certificate of registration shall be conspicuously displayed, in the manner and form as the Department may require by rule, at the place of business which the person so registered states in his application to be the principal place of business from which he engages in the business of selling tangible personal property at retail in this State. No certificate of registration issued prior to July 1, SB3019 Enrolled LRB104 20255 HLH 33706 b Public Act 104-0468