California Streets And Highways Code Section 36615

Property owner or owner means any person shown as the owner of land on the last equalized assessment roll or otherwise known to be the owner of land by the city council. The city council has no obligation to obtain other information as to the ownership of land, and its determination of ownership shall be final and conclusive for the purposes of this part. Wherever this subdivision requires the signature of the property owner, the signature of the authorized agent of the property owner shall be sufficient.