Wyo. Stat. § 17-21-301: Partner agent of partnership.

(a) Subject to the effect of a statement of partnership authority pursuant to W.S. 17-21-303:

(i) Each partner is an agent of the partnership for the purpose of its business. Any act of a partner, including the execution of an instrument in the partnership name, for apparently carrying on in the usual way the partnership business or business of the kind carried on by the partnership binds the partnership, unless the partner has no authority to act for the partnership in the particular matter and the person with whom the partner is dealing knows or has received a notice that the partner lacks authority;

(ii) An act of a partner which is not apparently for carrying on in the usual way the partnership business or business of the kind carried on by the partnership does not bind the partnership unless authorized by the other partners.