1 - 2 or 1 - 3 is used to show limit raise values in openers minor and denies a four card major.
This bid promises 5 of the minor.With only 4 find another bid.
It is used in conjunction with Inverted Minors which show game values.
Criss Cross is on over interference because Mike Lawrence likes it and that is good enough for me.
It is used over interference to show limit raise or better. That way the opponents cannot get in our face without partner knowing what is going on. Much better to show the limit raise or better than it is to redouble showing 10 HCP or more.