Effective January 1, 1986, the departmental administrative contingency assessment is an assessment of six one-hundredths of one percent to be assessed upon the wages as defined in Section 41-27-380(2) of all employers except those who have either elected to make payments in lieu of contributions as defined in Section 41-31-620 or are liable for the payment of contributions as defined in Section 41-31-620 or are liable for the payment of contributions and are classified as a state agency or any political subdivision or any instrumentality of the political subdivision as defined in Section 41-27-230(2).