Wyo. Stat. § 33-39-222: Requirement for payment.

An appraisal management company shall, except in cases of breach of contract or substandard performance of services, make payment to an independent appraiser for the completion of an appraisal or valuation assignment within sixty (60) days of the date on which the independent appraiser transmits or otherwise provides the appraisal or valuation study to the appraisal management company or its assignee unless a mutually agreed upon alternate arrangement has been previously established.