(a) Where the county government has already constructed sewers or water mains to which 50 or more houses have been connected, the county government may establish, upon request of the County Engineer, a new district, or revise the boundaries of an established district by posting at 4 public places in the district, notices describing the new or revised boundaries, and, in the case of the establishment of a new district, the same cost and assessment data required for districts established by vote of electors.
(b) Within 90 days after the posting of the notices of the establishment of the district in accordance with the provisions of subsection (a) of this section, the county government shall pass a formal resolution establishing the district, which shall:
(1) Contain a description of the boundaries of the district;
(2) Direct the County Engineer and the attorney of the county government to procure the necessary land and rights-of-way by purchase, agreement, or condemnation in accordance with existing statutes; and
(3) Authorize the County Engineer to prepare maps, plans, specifications, and estimates, let contracts for and supervise the construction and maintenance of, or enlarging and remodeling of, any or all structures required to provide for the safe disposal of the sewage or furnishing of water in the sanitary or water district.