In these rules, the term "contingent fee agreement" means an agreement, express or implied, for legal services of an attorney or attorneys (including any associated counsel), under which compensation, contingent in whole or in part upon the successful accomplishment or disposition of the subject matter of the agreement, is to be in an amount which either is fixed or is to be determined under a formula. The term "contingent fee agreement" shall not include an arrangement with a client, express or implied, that the client in any event is to pay to the attorney the reasonable value of his services and his reasonable expenses and disbursements.
Wyo. R. State Bar, Att'y Cond. & Prac. 1