(1) A firm or permit holder shall not pay a commission to obtain a client, nor accept a commission for a referral to a client of products or services of others when the firm or permit holder also performs for that client any services for which professional standards require independence. This prohibition applies during the period in which the firm or permit holder is engaged to perform any services requiring independence and the period covered by those services.

(2) A firm or permit holder who is not prohibited by this rule from performing services for or receiving a commission and who is paid or expects to be paid a commission shall disclose that fact in writing to any person or entity to whom the firm or permit holder recommends or refers a product or service to which the commission relates. Written acknowledgment of such disclosure shall be obtained.

(3) Any firm or permit holder who accepts a referral fee for recommending or referring any service of a firm or permit holder to any person or entity or who pays a referral fee to obtain a client shall disclose such acceptance or payment in writing to the client and obtain written acknowledgment of such disclosure.

(4) This rule shall not prohibit payments for the purchase of an accounting practice or retirement payments to individuals formerly engaged in the practice of public accountancy, or payments to their heirs or estates.