Ordinances shall not go into effect before thirty days from the time of final passage and are subject to referendum during the interim except:
(1) Ordinances initiated by petition;
(2) Ordinances necessary for immediate preservation of public peace, health, and safety which contain a statement of urgency and are passed by unanimous vote of all the commissioners;
(3) Ordinances providing for local improvement districts.
[1965 c 7 § 35.17.230. Prior: (i) 1911 c 116 § 22, part; RRS § 9111, part. (ii) 1911 c 116 § 21, part; RRS § 9110, part.]