Neb. Rev. Stat. § 84-1309.01
The board shall provide benefit liability information and other assistance to the Nebraska Investment Council for the establishment of policy portfolio objectives for the investing and reinvesting of the assets of the retirement system. The board shall verify that the investments of the assets of the retirement system by the council and the state investment officer are invested and reinvested for the exclusive purposes of providing benefits to members and members' beneficiaries and that the assets of the retirement system are not invested with the sole or primary investment objective of economic development or social purposes or objectives. Such verification shall be included in the written plan of action pursuant to subsection (3) of section 84-1503.
Neb. Rev. Stat. § 84-1309.01