; (4) obtain agreements to carry out recommended soil conservation measures and proper farm plans from owners of not less than 50 percent of the land situated in the drainage area above each retention reservoir to be installed with Federal assistance; and (5) submit a plan of repayment satisfactory to the Secretary for any loan or advancement made under section 12. (b) Cost share or advance payments for certain activities (1) Public fish and wildlife or recreational development (A) In general If a local organization agrees to operate and maintain any reservoir or other area included in a plan for public fish and wildlife or recreational development, the Secretary shall not bear more than 50 percent of the costs of— (i) the land, easements, or rights-of-way acquired or to be acquired by the local organization for such reservoir or other area; and (ii) minimum basic facilities needed for public health and safety, access to, and use of such reservoir or other area for such purposes. (B) Recreational development (i) Conditions The Secretary may participate in recreational development in any watershed project under subparagraph (A) only to the extent that the need for the recreational development is demonstrated in accordance with standards established by the Secretary— (I) taking into account the anticipated man-days of use of the projected recreational development; and (II) giving consideration to the availability within the region of existing water-based outdoor recreational developments. (ii) Limitations The Secretary may participate in— (I) not more than 1 recreational development in a watershed project containing less than 75,000 acres; (II) not more than 2 recreational developments in a watershed project containing— (aa) not less than 75,000 acres; and (bb) not more than 150,000 acres