Except as otherwise provided in this section, every resolution or ordinance passed by the governing body takes effect on the twentieth day after its publication, unless suspended by operation of a referendum. An ordinance or resolution may take effect immediately if it: (1) Is necessary for the immediate preservation of the public peace, health, safety, or support of the municipal government and its existing institutions; (2) Is not subject to referendum pursuant to § 9-20-19 ; or (3) Provides for an election or hearing on an improvement or assessment or calls for bids. Source: SL 1899, ch 94 , § 1; RPolC 1903, §§ 1213, 1214; SL 1913, ch 119 , § 38; RC 1919, §§ 6246, 6252, 6253; SDC 1939, § 45.1010; SL 1957, ch 244 ; SL 2026, ch 33 , § 43.