Nebraska constitution
Article IV: executive
Section 16

If the Governor or the person in line of succession to serve as Governor is absent from the state, or suffering under an inability, the powers and duties of the office of Governor shall devolve in order of precedence until the absence or inability giving rise to the devolution of powers ceases as provided by law. After January 1, 1975, the Lieutenant Governor shall serve on all boards and commissions in lieu of the Governor whenever so designated by the Governor, shall perform such duties as may be delegated him by the Governor, and shall devote his full time to the duties of his office.