(a) All of the rules of professional conduct shall apply to and must be observed by a certificate or registration holder and any individual who holds a certificate of license as a CPA in another state and whose principal place of business is not in this state but offers or renders professional accounting services in this state pursuant to §901.462 of the Act (relating to Practice by Out-Of-State Practitioner with Substantially Equivalent Qualifications) engaged in the client practice of public accountancy.(b) Notwithstanding subsection (a) of this section, the following rules of professional conduct shall be required of all licensees, including licensees practicing pursuant to §901.462 of the Act and certificate or registration holders not employed in the client practice of public accountancy:(1) §501.63(b) of this chapter (relating to Reporting Standards);(2) §501.73 of this chapter (relating to Integrity and Objectivity) when in an employer/employee relationship;(3) §501.74 of this chapter (relating to Competence); (4) §501.77 of this chapter (relating to Acting through Others);(5) §501.78 of this chapter (relating to Withdrawal or Resignation);(6) §501.90 of this chapter (relating to Discreditable Acts);(7) §501.91 of this chapter (relating to Reportable Events);(8) §501.92 of this chapter (relating to Frivolous Complaints);(9) §501.93 of this chapter (relating to Responses); and(10) §501.94 of this chapter (relating to Mandatory Continuing Professional Education).