Channel 4 reports that whenever Massport takes over property, Boston Police lose their police powers. Might make sense for Logan, but the authority controls growing chunks of South Boston waterfront as well:
This issue is causing tension between Boston police and State police. For example, on the sidewalk in front of the New Seaport Hotel, Boston Police have no police powers. Because the hotel is owned by Massport, it is the exclusive jurisdiction of the State police.
Of course, the issue is hardly a new one for those of us who live on or near parkways, where there's a similar phenomenon (get into an accident on the VFW Parkway in West Roxbury, and you have to wait for State Police to show up).