In Missouri, what is « doing law business » and who may do it?
Answered for: Missouri
No person shall engage in the practice of law or do law business, as defined in section 484.010 , or both, unless he shall have been duly licensed therefor and while his license therefor is in full force and effect
The Missouri section covers two activities, the practice of law and doing law business, and points to section 484.010 for what those words mean.
This answer is true in Missouri and nowhere else on this site. Another jurisdiction is another answer, or an honest gap: see what has been read for Missouri.