1) A solid or semi-solid single suited hand with at least game values, 3 or 4 card support and slam potential .....Rebid your suit next

2) A good suit in the suit bid plus good 4 card or longer support, again with game values and slam potential ...support partner’s suit next or, with a tremendous hand, cue bid

3) A strong balanced hand, at least 16 HCP and 3-card support ...rebid NT next.

Opener is expected to bid naturally ignoring reverses, etc.