How to set required for group of condition type in the same condition class

Hello,

          we have a group of condition type with the same condition class B, the last one have been set, and all of others will be inactive.

but we don't set any required for all the condition types in pricing control, so if user don't set any of them, the sales order or billing is still saved. that is a risk.How can i fix it? Thanks.

Sophie