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this State without a certificate of registration (either because the certificate of registration has been revoked or because of a failure to obtain a certificate of registration in the first instance) from engaging in such business until such person, as if he or she were a new applicant for a certificate of registration, shall comply with all of the conditions, restrictions and requirements of Section 2a of this Act and qualify for and obtain a certificate of registration. Upon refusal or neglect to obey the order of the court, the court may compel obedience thereof by proceedings for contempt. It shall not be a defense in a proceeding before the Department to revoke a certificate of registration issued under the Act, or in any action by the Department to collect any tax due under this Act, that the holder of the certificate is a party to an installment payment agreement under Section 2a of this Act if the liability which is the basis of the revocation proceeding, or the tax that is sought to be collected: (1) was incurred after the date of the agreement was approved by the Department; or (2) was incurred prior to the date the agreement was approved by the Department, but was not included in the agreement; or (3) was included in the agreement, but the taxpayer is in default of the agreement. If a person who is licensed as a retailer of alcoholic liquor under the Liquor Control Act of 1934 has had his or her certificate of registration revoked under this Section 2b, SB3019 Enrolled LRB104 20255 HLH 33706 b Public Act 104-0468