How to setup Credit Limits for a Party and enforce it for parties/accounts that are related to it in

1) Create a Party P0 as Global Ultimate with no account and only Party

2) Create 2 parties P1 and P2 with an account each. These would be the actual Customers against whom sales orders would be entered in OM

3) Create a Party relationship for P0 to P1 and P2

4) Maintain a Credit Limit at only Party P0

5) Enter an order for either P1 and P2.

6) The goal is that the orders against P1 and P2 should respect the credit limit of the party only parent P0

Questions:

a) How to achieve above scenario?

b) I understand that in order to setup credit limit at P0 level, i would have to use the API but where can I see the set credit limit after initial setup