User Defined Fields User Guide Creating Custom Fields in Oracle Banking Treasury Management Date Field Define Additional Validation Rules 1.5.6 Define Additional Validation Rules This topic describes how to define the validation rules. Apart from specifying the validation type for a field, you can specify additional validation rules to meet the requirements of the bank. To indicate that additional validations are required for a particular user defined field, check against ‘Validation Allowed’.This will allow you to write a code to validate the value in the new field. Click Validation button to write the validation code. Figure 1-4 Validation RuleDescription of "Figure 1-4 Validation Rule" Click Ok to close the screen. Parent topic: Date Field