The petition shall be addressed to the board of supervisors of the county within which the district is situated, shall be signed by the number of qualified registered voters specified in Section 1253, and shall propose and set forth:
(a) The annexation of new territory under this article.
(b) The calling by the board of supervisors of a meeting to conduct a hearing upon the question whether the new territory should be annexed.
(c) An accurate description of the boundaries of the new territory specifying what portion of the territory is incorporated and what portion unincorporated.
(Added by Stats. 1961, Ch. 34.)