The use by the public of all libraries established and maintained by the state, counties, townships, municipalities, and chartered governmental units under the provisions of this code, subject to such reasonable rules and regulations as may be prescribed by the authorized commission or board in charge of such libraries shall be free except as otherwise expressly provided by law.

Source: SDC 1939, § 29.0311; SDCL, § 14-1-1; SL 1975, ch 155, § 4.