(a) A water improvement district may provide for irrigation of the land within its boundaries.
(b) A district operating under Article XVI, Section 59, of the Texas Constitution, may furnish water for domestic, power, and commercial purposes.
(c) A district may be formed to cooperate with the United States under the federal reclamation laws for the purpose of:
(1) construction of irrigation and drainage facilities necessary to maintain the irrigability of the land;
(2) purchase, extension, operation, or maintenance of constructed facilities; or
(3) assumption, as principal or guarantor, of indebtedness to the United States on account of district lands.