from para 2.27.3, AFI 34-1201
This flag can be used at ceremonies when a member of the Senior Executive Service is present and has an active role in the ceremony. It is never appropriate to case a Senior Executive Service member’s individual flag.  (note:  the provision to place the SES flag in order of precedence among other individual flags that was contained in the previous draft AFI 34-XXXX is not included in AFI 34-1201.)

from paragraph 2.36.5, AFI 34-1201
Senior Executive Service Flags. All members of the Senior Executive Service are issued an Air Force Senior Executive Service flag from the Air Force Senior Executive Management Office. Organizations may purchase a base and flagstaff for use in displaying the Senior Executive Service flag.

2.36.5.1. Members of the Senior Executive Service should take their issued flag with them when they move to another Senior Executive Service position within the Air Force.

2.36.5.2. Senior Executive Service flags are Air Force property and must be accounted for and retained by the Air Force when a member of the Senior Executive Service separates or retires. However, supervisors may present the SES flag to a separating/retiring member after notifying Air Force Senior Executive Management Office of their intent to present the member’s flag. Additional flags may be purchased by calling that office for further details.