Fla. Stat. § 905.22
The foreperson, state attorney, or assistant state attorney shall administer an oath or affirmation in the manner prescribed by law to any witness who testifies before the grand jury.
History.--s. 101, ch. 19554, 1939; CGL 1940 Supp. 8663(101); s. 61, ch. 70-339; s. 1501, ch. 97-102.