31 CFR § 802.211 - Covered real estate.
The term covered real estate means real estate that:
(a) Is, is located within, or will function as part of, a covered port; or
(b) Is located within:
(1) Close proximity of any military installation described in § 802.227(b) to (o), or another facility or property of the U.S. Government, in each case as identified in the list at part 1 or part 2 of appendix A to this part;
(4) Any part of a military installation described in § 802.227(p), as identified at part 4 of appendix A to this part, to the extent located within the limits of the territorial sea of the United States.