[ic] Check Box Limits

[interchange-users@interchange.redhat.com (Jim Webster)]

I need a set of check boxes but I need to allow only 2 choices... Is this
possible?

Example:
Choose from the following (2 choices only):

Select Box 1
Select Box 2
Select Box 3

I assume if it's possible, this is setup in order.profile just can't find
any info in IC Developers Resource and need help with the code.

Thanks.

Jim Webster