C.R.S. § 37-41-145

The board of directors, at the same time and place mentioned in the notice or at the time to which the hearing of said petition may be adjourned, shall proceed to hear the petition and all objections thereto presented in writing by any persons, showing cause why the prayer of said petitioner should not be granted. The filing of such petition with such board shall be deemed as an assent by each and all of such petitioners to the exclusion from such district of the lands mentioned in the petition, or any part thereof.