Wyo. Stat. § 15-6-420: Assessments; enforcement of installment liens.

If the assessment upon property is payable in installments, the enforcement of the lien of any installment by any method authorized in this chapter does not prevent the enforcement of the lien of any subsequent installment when it becomes delinquent. Any city or town may provide by ordinance that upon failure to pay any installment when due, the entire assessment is due and payable and the collection enforced in the manner prescribed.