Mo. Rev. Stat. § 515.080
If more than one referee be appointed, all the referees must meet together and hear all the proofs and allegations of the parties; but a report made and every other act done by a majority of them, shall be valid.
(RSMo 1939 § 1151)
Prior revisions: 1929 § 985; 1919 § 1435; 1909 § 2005