The vote of the members of the house of representatives may be taken and recorded by mechanical means in all cases where a vote by roll call is required by the constitution or ordered by members of the house.
Mo. Rev. Stat. § 21.330
Mechanical roll call for house authorized
Effective: 28 Aug 1957; (L. 1947 V
Official source: Missouri Revisor of Statutes. Reproduced from public-domain Missouri statutes; confirm against the official source for the current text. Not legal advice.