A cpa firm performs the annual audit of the leahy group, a private company. the client has asked the firm to perform a study to determine whether the company would qualify for certain municipal tax credits and prepare the request. the firm will receive 15 percent of any tax credits that leahy obtains for the client as a result of the request but no fees if the request is denied. city officials do not perform a substantive review of each request for tax credits. would this fee arrangement be permitted under the aicpa code of professional conduct?