CAST/ICAO Common Taxonomy Team

The Taxonomy Maintenance Working Group reviews requests/recommendations for changes to existing taxonomies on a quarterly basis. To be considered, all requests for changes must be submitted on or before the cut-off date for the current quarter shown on the update schedule.

Update Schedule

CICTT Taxonomy Standard Proposal Request Form 1000

Recommendation for Change to Existing CICTT Standardized Taxonomy – Form 2000

CICTT Taxonomy Value Change Request Form 2000-A (Aircraft MMS Taxonomy)

CICTT Taxonomy Value Change Request Form 2000-E (Engine Taxonomy)