A verification requirement provides the rules of verification for a piece of data (verifiable data item). There are many variables included in these rules including where and how the rules apply at runtime. For example whether the verification engine needs to apply the rules to participant level data or to a specific product delivery case or to a specific integrated case. Again using date of birth as an example of a verifiable data item, for some organizations the rules may be to verify this piece of data once and therefore verification engine applies the rules within participant manager. For other organizations the rules may require that date of birth is verified at a program level and therefore the verification engine applies the rules to specific product delivery cases - see 3.5.3 Verification Requirement Usages for further information.