> If an officer is unable to complete an inspection of an electronic device because it is protected by a passcode or encryption, the Officer may, in accordance with section 5.4 below, detain the device pending a determination as to its admissibility, exclusion, or other disposition.
Section 5.4 elaborates further.
Also, I found 5.1.2 interesting:
> Officers may not intentionally use the device to access information that is solely stored remotely. To avoid retrieving or accessing information stored remotely and not otherwise present on the device, Officers will either request that the traveler disable connectivity to any network (e.g. by placing the device in airplane mode), or, where warranted by national security, law enforcement, officer safety, or other operational considerations, Officers will themselves disable network connectivity.