The appraisers shall take and subscribe an oath annexed to such appraisements, to the effect that the property mentioned in the schedule is, to the best of their judgment, worth the sums specified therein, that the same is the fair cash value thereof at the time, exclusive of liens and encumbrances; which oath the sheriff is authorized to administer and attest when taken and subscribed by the appraisers.
NMS § 39-5-11