| Name | Data Type | Definition | |
|---|---|---|---|
| RULE | string | A prescribed guide for conduct or action. | |
| LAW | string | A binding rule, enforced by the national/international legislation. | |
| PROCEDURE | string | A particular way of accomplishing something or of acting | |
| PRACTICE | string | The usual way of doing something, even if it is not formally prescribed | |
| ICAO_DIFF | string | A difference between the national rules/procedures and the ICAO Standards, Recommended Practices and Procedures. | |
| OTHER | string | Other |