For purposes of sections 68-601 to 68-631, unless the context otherwise requires:

(1) Wages shall mean all remuneration for employment, including the cash value of all remuneration paid in any medium other than cash, except that wages shall not include that part of such remuneration which, even if it were for employment within the meaning of the Federal Insurance Contributions Act, would not constitute wages within the meaning of the act;

(2) Employment shall mean any service performed by an employee in the employ of the State of Nebraska or any political subdivision thereof for such employer except (a) service which, in the absence of an agreement entered into under sections 68-601 to 68-631, would constitute employment as defined in the Social Security Act or (b) service which under the act may not be included in an agreement between the state and the Secretary of Health and Human Services entered into under sections 68-601 to 68-631. Service which under the act may be included in an agreement only upon certification by the Governor in accordance with section 218(d)(3) of the act shall be included in the term employment if and when the Governor issues, with respect to such service, a certificate to the Secretary of Health and Human Services pursuant to subsection (2) of section 68-624;

(3) Employee shall include an officer of the state or a political subdivision thereof;

(4) State agency shall mean the Director of Administrative Services;

(5) Secretary of Health and Human Services shall include any individual to whom the Secretary of Health and Human Services has delegated any functions under the Social Security Act with respect to coverage under such act of employees of states and their political subdivisions and, with respect to any action taken prior to April 11, 1953, includes the Federal Security Administrator and any individual to whom such administrator had delegated any such function;

(6) Political subdivision shall include an instrumentality of the state, of one or more of its political subdivisions, or of the state and one or more of its political subdivisions, but only if such instrumentality is a juristic entity which is essentially legally separate and distinct from the state or subdivision and only if its employees are not by virtue of their relation to such juristic entity employees of the state or subdivision;

(7) Social Security Act shall mean the Act of Congress approved August 14, 1935, Chapter 531, 49 Stat. 620, officially cited as the Social Security Act, including regulations and requirements issued pursuant thereto, as such act has been amended or recodified to December 25, 1969, and may from time to time hereafter be amended or recodified; and

(8) Federal Insurance Contributions Act shall mean Chapter 21, subchapters A, B, and C of the Internal Revenue Code, and the term employee tax shall mean the tax imposed by section 3101 of such code.