Get Attributes for a rule in bsp component

Hi,

I have a requirement to throw an error message for a check in rule attributes for a territory id in terr. management, web ui.

I have to get all the attributes from component usage, set for a new rule, check whether this attribute value is assigned to any other territory. If yes, then throw an error msg and it should not allow user to save the particular rule. can this be done in component MD110FDT_TMGMT/RuleAccessVS. The component for attributes is FDT_EXP/ConditionFormView.

Please help.