Dan is a licensed public accountant and one of twelve partners in an audit firm in Toronto. He also actively volunteers in an environmental group lobbying to re-naturalize the Don River. New government legislation requires the charity to be audited this year. Jeff would like to do the work since he believes in public service. The President of the charity has happily accepted Dans unsolicited offer. The situation above may involve a violation of one of the rules of professional conduct. State the rule in question and explain why or why not there is a violation of the rule.