W. Va. Code § 16-12-13
Additional contiguous territory may be added to any sanitary district organized under this article in the manner following, to-wit: Ten percent or more of the legal voters resident within the limits of such proposed addition to such sanitary district may petition the county court of the county in which the original petition for the formation of said sanitary district was filed, to cause the question to be submitted to the legal voters of such proposed additional territory whether said proposed additional territory shall become a part of any contiguous sanitary district organized under this article and whether such additional territory and the taxpayers thereof shall assume a proportionate share of the bonded indebtedness, if any, of such sanitary district. Such petition shall be addressed to the county court of the county in which the original petition for the formation of the said sanitary district was filed, and shall contain a definite description of the boundaries of the territory sought to be added: Provided, That no territory disqualified in section one of this article shall be included.
Upon filing such petition in the office of the county clerk of the county of which the original petition for the organization of such sanitary district was filed, it shall be the duty of the county court of the county in which the original petition for the formation of the said sanitary district was filed, to call to its assistance the county courts of all the counties in which portions of such sanitary district and the proposed addition or additions thereto are situated, and such county courts after electing a presiding officer from among themselves, shall constitute themselves a board of commissioners which shall have the power and authority to consider the limits and boundaries of such proposed additional territory, in the same manner as provided for locating, fixing and deciding of the limits and boundaries of the original sanitary district, as provided in section one of this article. If such sanitary district as originally organized and the proposed addition or additions are located in one county, the county court of such county shall act in the same capacity and manner as provided for in locating, fixing and deciding of the limits and boundaries of the original sanitary district, as provided in section one of this article.
Notice shall be given by the county court of the time and place when and where all persons interested will be heard substantially as provided in and by section one of this article. The conduct of the hearing and the manner of conducting the subsequent election on the question whether the proposed additional territory shall become a part of such sanitary district and the issuance, reception, return and canvassing of the ballots shall be, as nearly as possible, in accordance with the provisions of section one of this article; the ballot for the election provided for in this section shall be substantially as follows, to wit:
/ / For joining sanitary district and assuming a proportionate share of bonded indebtedness, if any.
/ / Against joining sanitary district and assuming a proportionate share of bonded indebtedness, if any.
If a majority of votes cast at such election shall be in favor of becoming a part of such sanitary district and if the trustees of such sanitary district accept the proposed additional territory by ordinance annexing the same, the county court shall enter an appropriate order in the records of the county court, and such additional territory shall thenceforth be deemed an integral part of such sanitary district. Any such sanitary district upon petition addressed to such county court, signed by a majority of the owners of lands constituting such territory who shall have arrived at lawful age and who represent a majority in area of such territory, which said petition shall contain a definite description of the boundaries of such territory, shall set forth the willingness of the petitioners that such territory and the taxpayers thereof assume a proportionate share of thebonded indebtedness, if any, of such sanitary district. Upon the filing of such petition and notice of, and hearing, and decision upon the same by the aforesaid county court or board of commissioners, all as hereinbefore provided, such county court or board of commissioners shall enter an order or orders containing its findings and decision as to the boundaries of the territory to be annexed, and thereupon, if the board of trustees of such sanitary district shall pass an ordinance annexing the territory described in such order to said sanitary district, said county court shall enter an appropriate order as hereinbefore provided, and such additional territory shall thenceforth be deemed an integral part of such sanitary district.
W. Va. Code § 16-12-13