"6. If the ownership of the land upon which a lien is imposed pursuant to subsection 5 is severed from the ownership of the right to use the water, the lien remains in effect on the land until:

(a) The place of use of the water is changed to:

(1) Land upon which a lien is imposed pursuant to subsection 5, if such change is in accordance with applicable statutes and regulations; or

(2) Stream systems where a decree of court has been entered, if that change is in accordance with the decree or any rules adopted pursuant to the decree; or

(b) The owner of the right to use the water enters into a written agreement with the irrigation district for the payment of assessments, tolls or charges required pursuant to this section. Except as otherwise provided in this paragraph, the payment must be secured by the right to use the water in a manner that is satisfactory to the irrigation district. If the owner of the right to use the water is the Federal Government or one of its agencies, or the State of Nevada or one of its agencies or political subdivisions, the agreement is not required to be secured in such a manner.".