| Code Value | Definition |
|---|---|
| High | See CANADA / USA Bi-National VOI Lexicon dated APRIL 2007, value High |
| Low | See CANADA / USA Bi-National VOI Lexicon dated APRIL 2009, value Low |
| Medium | See CANADA / USA Bi-National VOI Lexicon dated APRIL 2008, value Medium |
| Negligible | See CANADA / USA Bi-National VOI Lexicon dated APRIL 2010, value Negligable |