Subject to subsection (b) of this section and while a permit is in effect, it authorizes the holder to: operate a business through which an individual practices certified public accountancy; and represent to the public that the business provides the services of a licensed certified public accountant. A permit authorizes the holder to provide a service that constitutes practicing certified public accountancy only if the service is performed by an individual who is licensed or otherwise authorized under this title to practice. A firm may use the title “CPA” or “CPA firm” without a permit issued under this section if the firm is performing other professional services that do not require a permit if: the firm performs those services through an individual with a practice privilege under § 2–321 of this title; and the firm performs those services in the state where the individual with a practice privilege retains a principal place of business.