Mo. Rev. Stat. § 540.070
540.070 Challenge for other causes not allowed.
540.070. Challenge for other causes not allowed. — No challenge to the array of grand jurors, or to any person summoned as a grand juror, shall be allowed except as provided in section 540.045 and in section 540.050 .
(RSMo 1939 § 3904, A.L. 1989 S.B. 127, et al.) Prior revisions: 1929 § 3515; 1919 § 3860; 1909 § 5068