A licensee shall make every effort to avoid conflicts of interest with the employer or client. Whenever conflicts of interest appear unavoidable, however, the licensee shall disclose promptly and fully all the circumstances to the employer or client. A licensee shall inform promptly an employer or client of any business association, interest, or circumstances which may influence the judgment or the quality of services rendered to the employer or client. A licensee may not accept compensation, financial or other, from more than one party for services pertaining to a project unless full disclosure is made by the licensee to all interested parties. A licensee may not solicit or accept financial or other valuable consideration from any material or equipment supplier for specifying the supplier's products, except when the licensee is a previously announced employee or agent of the supplier. When acting as the interpreter of engineering documents and the judge of performance under the documents, a licensee shall render decisions impartially, not favoring either party to the documents.