For example, a prime has a contract with the DOD for some missiles. The prime has a proprietary drawing, for something simple like a washer, or an o-ring the drawing says "proprietary to Prime Company" and is sent to us along with a purchase order. Is this drawing considered CUI as it's a supporting document/data for this contract? If not, is there ever a way for the primes information to become CUI , or is CUI only for government information?