When partner opens 2 you must respond 2 unless you have a suit to bid showing 2 of the top 3
This system is on over a double but off if they bid a suit.
Interference to any level and you pass with at least an Ace or King and double or redouble with no Ace or King.
After 2 -2 a 2 bid is a relay to 2.
Openers rebids after 2.