Billing periods.

Users of DCS data processing services shall be billed semi-monthly. When cash reserves are deemed adequate the director may elect to bill on a monthly basis. In the event extraordinary expenses are incurred the director is authorized, with the approval of the secretary, to request payment in advance based on the billing history of each user of services. (Authorized by K.S.A. 75-3706 and 75-4703 ; effective May 1, 1978.)