My point was to the character and calibur of the delegates we might expect. Yes, many states forbid state officeholders from holding convention seats, but not all. What 1992 federal law are you referring to? If it’s the authorizing resolution for the 27th Amendment, then it only applies to that amendment.
When Congress lost its court case trying to force the Archivist to toss the 27th Amendment out of the Constitution, it sat down and codified the things the court had said that Congress had failed to codify. Congress also added the contents of a bill written by Everett Dirksen in 1965 setting up the ground rules for a Convention for Proposing Amendments, and Orren Hatch was the man who got that added to the bill. Congress passed it in 1992.