Okla. Stat. tit. 82, § 82-642

Deeds.

All conservancy assessments as provided for in this title,

together with all costs in collecting the same, remaining unpaid

after they become due and collectable, shall constitute a lien on

the specific properties against which the said assessments have been

levied, said lien to be coequal with the lien of ad valorem taxes

and all other taxes and all special assessments and shall be prior

and superior to all other liens upon all the lands and other

property against which such assessments shall be levied as is

provided in this title. Such assessments shall be collected in each

county by the county treasurer of each county as and at the time ad

valorem taxes are collected, and any tax sale shall include all

charges, and such lien may be evidenced by any ad valorem tax sale

certificate including said charge substantially in the form required

by law.

If any assessment made pursuant to the provisions of this title

shall prove invalid, the board of directors shall subsequently amend

all acts or proceedings promptly, and without delay remedy all

defects or irregularities as the case may require by making and

providing for the collection of new assessments or otherwise.

Unless expressly declared to the contrary, no warranty deed or

other deed made pursuant to a judicial sale shall warrant against

any portion of any assessment or assessments levied hereunder except

installments due before the date of such deed.