The business certificate of registration and the individual certificate of each dispenser employed at a permanent business location shall be conspicuously posted in open view at such location.

If there is a change in any information set forth in the application after the issuance of a certificate of registration, a statement of amendment on a form prescribed by the department and executed in the manner required for an application shall be filed by the registrant within 10 days of such change. However, a change of address shall be reported within 30 days.

No individual, partnership or corporation or other entity or group of persons shall operate under an existing certificate of registration, if there has been a transfer of ownership of the business. For the purpose of this subdivision, a transfer of ownership shall mean a transfer by an individual owner of any portion of his interest, or a transfer of 50 percent or more of the partnership interest or of the issued and outstanding stock of a corporation or other entity.