Order Management Processing Constraint steps

The following are the Setups done for processing constraints using API to validate Records in Sales Order Form:-

1)     In Setup of Order Management Responsibility, 

        /setup/rules/security/Validation  Templates, in Order Management Application,
        define a validation template under Entity: Order Line, with
        Template name : 
        Regulatory Hold Validation
        Validation Type: API.
       
        PL/SQL Package Name: <PL/SQL package name> and 

        PL/SQL Procedure : <PL/SQL procedure name>
       
2)    In Setup Order Management Responsibility, /setup/rules/security/Processing 

       Constraints, assign the above validation template
       Regulatory Hold Validation to Processing Constraints
       
       Under Application: Order Management, Entity: Order Line, Record Set: Line