I recently purchased Design Pattern Framework 4.0.
In the document it is mentioned like
Here is an example of a more complex rule. There may be a rule that states that customers are ranked according to their recent order history. Customers with 10 or more orders over the last 3 months receive gold status, customers with 5 to 10 orders receive silver status, and customers with fewer than 5 orders are given bronze status. These statuses can be used to determine the relative priority treatment they receive when calling a 1-800 customer support number. When an order is placed, the rule in the business object re-evaluates the customer‟s ranking. These kind of rules require (in most cases) custom validation code.
In a more complex application you may have interdependent business rules encoded outside these objects (for example, if the bank account is over $5000 and more than 3 transactions have taken place in the last month, and the account holder‟s age is > 35 and is on the same job for more than 2 years, then accept the application).
Can someone guide me where and how to write above two validation in existing Design Pattern Framework 4.0.