(a) Within five (5) days after being notified of their appointment, the commissioners shall proceed to appraise and apportion the benefits to such lots and tracts of land, exclusive of streets and alleys, as are located within the assessment district, after having taken an oath to make a full and impartial apportionment. Any error in the description of a lot, parcel or tract of land liable for assessment shall not invalidate such assessment or lien thereof.(b) The commissioners shall use as a guide the estimated assessments theretofore prepared by the engineer, but the estimates shall not be binding upon the commissioners.(c) The commissioners shall have full and complete authority to vary the total assessment as between the various tracts, pieces and parcels of land, depending upon their nearness or remoteness to the facility, and nearness or remoteness to points of access to the limited access facility and any other factors that to the commissioners may appear as resulting in greater benefit to one such tract or parcel of ground than another.(d) A written report of such apportionment shall be returned and filed with the city or county clerk, within fifteen (15) days from the date of the notice to them of their appointment.Okla. Stat. tit. 69, § 1316
Laws 1968, c. 415, § 1316, operative 7/1/1968.