Neb. Const. art. III, § 16

No member of the Legislature or any state officer shall have a conflict of interest, as defined by the Legislature, directly in any contract, with the state or any county or municipality thereof, authorized by any law enacted during the term for which he shall have been elected or appointed, or within one year after the expiration of such term. The Legislature shall prescribe standards and definitions for determining the existence of such conflicts of interest in contracts, and it shall prescribe sanctions for enforcing this section. Source: Neb. Const. art. III, sec. 13 (1875); Amended 1920, Constitutional Convention, 1919-1920, No. 9; Amended 1968, Laws 1967, c. 322, sec. 1, p. 856; Amended 1972, Laws 1972, LB 1514, sec. 1.