credit management at three levels

Hi,

Please find the below client requirement.

Some distributors will have more than one
branch in each state & work in more than one state. Hence credit limit has
to be at three levels :

1. At branch
   level in one state.
2. At state level ( combination of branches within a
   state ).
3. At distributor level ( Combination of states).

If a branch exceeds the limit , then branch is to be blocked. If all branches in a
state excedd limit then state has to be blocked. If all states of a distributor
exceed the limit then distributor has to be blocked..the standard payment terms
are 30 days and if any payment is overdue then the billing to that branch has to stop.

Kindly suggest how to go ahead with this requirement.

Thanks,

Suresh