Mississippi Code Title 5. Legislative Department § 5-1-19

The lieutenant-governor, the president pro tempore of the senate, the secretary of the senate, the speaker of the house of representatives, and the clerk thereof, may administer oaths to the officers of their respective houses, and each shall take the oath of office prescribed by section two hundred and sixty-eight of the constitution. Each of said officers may administer oaths to witnesses before their respective houses, or any committee thereof, and the chairman of the committee of the whole, or of any standing, select, or special committee, or subcommittee of either house, or of any joint committee or subjoint committee, may administer oaths to witnesses before it in any case under examination.