Wyo. Stat. § 15-1-403 (2026)

by landowners' petition; validity of signatures; determinations.

     (a) The proceedings for annexation of eligible territory
may be initiated by a written petition filed with the clerk of
the city or town to which annexation of the territory is
proposed, after compliance with the following conditions and
procedures:

          (i) The petition is signed and dated by a majority of
the landowners owning a majority of the area sought to be
annexed, excluding public streets and alleys and tax exempt
property;

          (ii)   The petition contains the following detailed
information:

                 (A)   A legal description of the area sought to be
annexed;
                  (B)   A request that the described territory be
annexed;

                (C) A statement that each signer is an owner of
land and a description of his land within the area proposed to
be annexed; and

                  (D)   A map of the area.

     (b) No signature on the petition is valid if it is dated
more than one hundred eighty (180) days prior to the date of
filing the petition with the clerk. No person signing a
petition for annexation may withdraw his signature from the
petition after it has been filed with the clerk.

     (c) The clerk shall within ten (10) days from the date the
petition is filed, determine if the petition substantially
complies with this article.

     (d) If the petition complies, the clerk shall certify
compliance, and the procedure outlined in W.S. 15-1-402,
15-1-405 and 15-1-406 shall then be followed. If it does not
comply the petitioner shall be notified that no further action
will be taken on the petition until compliance is made.