Retrieve update rules

This method will retrieve all update rules that can be applied on a custom field.

Update rules specify how MyPreferences should update custom field values when adding or updating profiles. If you don't specify an update rule when creating a custom field, it defaults to always.

The following update rules are available: • Always (default): Always updates the value • If Current Value Is Blank: Only updates if existing value on the custom field is blank • If New Value Is Not Blank: Only updates if the incoming value is not blank • Never: Once added to a profile, the field cannot be updated or edited