Answer:
Step-by-step explanation:
I could not find any amendment passed in 1991. I did find one that was passed in 1992. It is amendment 27. What it says is that pay raises for senators and representatives cannot take place until an election of the representatives has taken place.
Apparently there were a lot of requests for pay raises and the public began to object, and so this amendment was introduced.
It is not the first time the constitution has seen such a request. In 1789 James Maddison put much the same thought forward as an amendment. Obviously it was defeated.