California Code, Government Code - GOV § 66499.22

A proceeding for exclusion shall be initiated by filing a petition therefor in the offices of the county surveyor and clerk of the board of supervisors of the county in which the subdivision or the portion thereof sought to be excluded is situated.  The petition shall accurately and distinctly describe the real property sought to be excluded by reference to the recorded map or by any accurate survey, shall show the names and addresses of all owners of real property in the subdivision or in the portion thereof sought to be excluded as far as the same are known to the petitioners, and shall set forth the reasons for the requested exclusion.  The petition shall be signed and verified by the owners of at least two-thirds of the total area of the real property sought to be excluded.