Effective 28 Aug 1955
472.090. Objections to petition, form. — Any interested person, on or before the day set for hearing, may file written objections to a petition previously filed, and, upon special order or general rule of the court, objections to a petition shall be filed in writing as a prerequisite of being heard by the court.
--------
(L. 1955 p. 385 § 10)