As used in this subchapter:
(1) "Practice unit" means:
(a) each permit holder who practices public accounting as an individual or sole proprietor;
(b) each separate office of a sole proprietorship, partnership, or professional corporation which practices public accounting; or
(c) a governmental organization which employs a permit holder in a public accounting capacity.
(2) "Peer review" means a review under a formal peer review program sponsored by the division of firms of the American Institute of Certified Public Accountants (AICPA) or such other formal peer review program approved by the Board of Public Accountants (board).