In Oracle General Ledger, Cross-Validation Rules enable a user to restrict entry of account code combinations. This is similar to Security Rules, which restrict entry of values for individual segments. In Oracle GL, account code combinations which have been already entered are not affected by new rules defined. As a result, a user must take care that before account code combinations are entered, such rules are defined before hand.

The Cross-Validation Rules are for the entire Key Accounting FlexField KAFF structure and not assigned to any responsibility. Thus, when a Cross-Validation Rule is defined for a KAFF, by default, GL excludes all combinations except those specifically included. Thus while defining the Cross Validation Rules, it is easier to start with a general inclusion an go on excluding ranges which are not required.