Certificate of registration.
(a)No person shall engage or continue to engage in the…#
(a) No person shall engage or continue to engage in the business of making any retail sales subject to tax under the provisions of this chapter without having obtained a certificate of registration therefor. If 2 or more persons constitute a single vendor as defined in this chapter, such persons may operate a single retail establishment under 1 certificate of registration and in such case neither the death or retirement of 1 or more of such persons from business in such establishment nor the entrance of 1 or more persons thereinto shall affect the certificate of registration for a period of 60 days or require the issuance of a new certificate until the expiration of such period.