UFC are living documents and will be periodically reviewed, updated, and made available to usersas part of the Services' responsibility for providing technical criteria for military , . Army Corps of Engineers (HQUSACE), Naval Facilities Engineering Command(NAVFAC), and Air Force Civil Engineer Support Agency (AFCESA) are responsible foradministration of the UFC system. Defense agencies should contact the preparing service fordocument interpretation and improvements. Technical content of UFC is the responsibility of thecognizant DoD working group. Recommended changes with supporting rationale should be sent tothe respective service proponent office by the following electronic form: Criteria Change Request(CCR). The form is also.