It's not a vague term in Texas.
»
www.tcleose.state.tx.us/ ··· rial.cfm»
www.statutes.legis.state ··· 1701.htm»
www.tcleose.state.tx.us/ ··· ions.cfmThings vary in different states.
For example, in many states, a Justice of the Peace is a very minor official, but they have a fair amount of power in Texas. Ignorance of that led to a confrontation after JFK's assassination when the Feds wanted to take his body back to Washington right away.