2. Petitions may be filed as follows: a. Any person or public corporation may present to the department a petition for the organization of a river regulating district pursuant to the provisions of title 21 of this article. Any such petitioner shall be a resident or owner of real estate within the proposed district, or if a public corporation, one whose boundaries lie wholly or partly within such district. b. The petition shall set forth:

1. (1) The proposed name of the district, as the ............... River Regulating District.
2. (2) The necessity for the organization of such district, the purposes to be accomplished thereby and the benefits to inure from the exercise of its powers.
3. (3) A general description of the territory included in the proposed district. Such description need not be given by metes and bounds, or by political subdivisions, but it shall be sufficient to state that the territory to be included in the proposed district constitutes the watershed of the particular river in reference to which the petition is filed stating generally the extent of such watershed. In the event that the district sought to be organized does not include the whole watershed of the particular river, but only the watershed of a tributary of the river, then, the petition should generally set forth the extent of such watershed, the reason why the watershed of the tributary should be organized as a separate river regulating district, and the relation of the regulation of the flow of such tributary to and effect upon the flow of the river to which it is tributary.
4. (4) The extent of the regulation possible through the construction and operation of reservoirs.
5. (5) Whether state or private lands, or both, will be required, and in general the extent thereof, and all such facts as would show or tend to show the public necessity for the regulation of the flow of the river.