; (B) rehabilitating or otherwise improving existing and historically irrigated land or projects; (C) agricultural development; (D) cultural preservation; (E) water resources development; and (F) other land- and water-related projects. (2) The Fort Belknap Indian Community Water Resources and Water Rights Administration, Operation, and Maintenance Account, of which only the earned interest may be used to pay for activities described in the Plan relating to— (A) the costs of administering the Tribal water rights, including through— (i) the development or enactment of a Tribal Water Code; and (ii) the establishment and operation of a Tribal water resources department; and (B) the annual operation and maintenance costs for Tribal and allotted water resources projects. (3) The Fort Belknap Indian Community Tribal Economic Development Account, the principal and interest of which may be used by the Fort Belknap Indian Community to pay the costs of such activities described in the Plan as the Fort Belknap Indian Community determines to be necessary to advance the economic development of the Fort Belknap Indian Community. (4) The Fort Belknap Indian Community Domestic Water Supply and Wastewater Systems Account, the principal and interest of which may be used by the Fort Belknap Indian Community to pay the costs of activities described in the Plan relating to— (A) preparation of a feasibility study and design of a water supply and sewer treatment system for the Fort Belknap Indian Community; (B) the planning, design, and construction of a domestic water supply system and related facilities for Tribal communities; (C) the planning, design, and construction of a wastewater treatment and collections system for Tribal communities