25 C.F.R. § 171.515 – Who will BIA bill?

(a) We will bill the landowner, unless:
1. (1) The land is leased under a lease approved by us, in which case we will bill the lessee, or
2. (2) The landowner(s) is represented by a representative organization that collects annual operation and maintenance assessments on behalf of its members and the representative organization makes a direct payment to us on your behalf.
(b) If you own or lease assessable lands within a BIA irrigation facility, you will be billed for annual operation and maintenance assessments, whether you request water or not, unless otherwise specified in § 171.505(b).