To refer to Advantage helper class methods (mostly static methods) in the Validation field on the Configurable Validation page, simply use method invocation by providing required parameters.
Note: This is not applicable to Advantage Performance Budgeting.
For example, if advancing Effective Date by 5 days to compare with the Application Date or if advancing Effective Date by 2 years to compare with the End Date in validation:
AMSUtil.addDays( EFFECTIVE_DT, 5 ) < applicationDate
or
AMSUtil.addYears( EFFECTIVE_DT, 2 ) < END_DT