14 CFR §183.67

1. (a)An ODA is effective until the date shown on the Letter of Designation, unless sooner terminated by the Administrator.
2. (b)No ODA may be transferred at any time.
3. (c)The Administrator may terminate or temporarily suspend an ODA for any reason, including that the ODA Holder:
   1. (1)Has requested in writing that the authorization be suspended or terminated;
   2. (2)Has not properly performed its duties;
   3. (3)Is no longer needed; or
   4. (4)No longer meets the qualifications required to perform authorized functions.