17. Classified information of any designation may be shared only with persons
determined by an appropriate United States Government official to be eligible for access, and who possess a "need to know." Among other requirements, in order for a person to obtain a security clearance allowing that person access to classified United States Government information, that person is required to and must agree to properly protect classified information by not disclosing such information to persons not entitled to receive it, by not unlawfully removing classified information from authorized storage facilities, and by not storing classified information in unauthorized locations. If a person is not eligible to receive classified information, classified information may not be disclosed to that person. In order for a foreign government to receive access to classified information, the originating United States agency must determine that such
release is appropriate.

[Highlighted portions all specifically relevant to what 45th did. NOTE: I am only at the end of page 5. I am going to skip ahead to "Probable Cause".]