CA Gov't Code Section 66499.25

The court may, if no objection has been filed, proceed without further notice to hear the petition. If during the hearing the petitioners produce to the court satisfactory evidence of the necessity of the exclusion of the real property, that the owners of two-thirds of the area of the real property sought to be excluded are the petitioners, and that there is no reasonable objection to making such exclusion, the court may proceed to exclude the real property sought to be excluded by the petition, and order the alteration or vacation of the recorded map, and enter its decree accordingly.