(a) The lead governmental entity shall describe the initial district territory in the resolution creating the district under Section 336.021. The initial district territory must include all territory of each municipality or county that agrees to have its territory in the district under Section 336.021, except as provided by Subsections (c) and (d).
(b) The district may include incorporated or unincorporated territory and may include any territory in one or more counties that agree by resolution to have the counties’ territory in the district under Section 336.021.

(c) If the boundaries of the proposed district include any territory that is part of a municipality that operates a municipal public library, the governing body of that municipality must consent by resolution to allow the inclusion of that municipal territory in the proposed district. This subsection applies only to a municipality whose municipal public library is:
(1) financed and operated by that municipality;
(2) accredited for membership in the state library system; and
(3) open and free of charge to all members of the public under identical conditions.
(d) Except as provided by this subsection and Subsection (c), the district includes all incorporated and unincorporated areas of a county that agrees by resolution to have its territory in the district under Section 336.021. In its resolution, the county may exclude any incorporated area of the county where the local sales and use tax exceeds one and one-half percent.