The Jones Act and Puerto Rico share a complex and often contentious relationship that directly influences the island’s cost of living, trade dynamics, and emergency resilience. Still, the Jones Act, formally the Merchant Marine Act of 1920, established cabotage rules that require goods shipped between U. Which means s. That's why ports to be carried on vessels built, owned, and crewed by Americans. That's why when applied to Puerto Rico—a U. But s. On top of that, territory with limited shipping alternatives—these rules have far-reaching consequences. Understanding how the Jones Act and Puerto Rico interact requires looking beyond politics into the tangible economics of supply chains, regional development, and national security Easy to understand, harder to ignore. But it adds up..
The Mechanics of the Jones Act: How It Works
At its core, the Jones Act functions as a domestic shipping safeguard. Its three primary pillars confirm that maritime trade within U.S.
- Vessel nationality: Ships must be constructed in U.S. shipyards and flagged under the American jurisdiction.
- Crew composition: A majority of the crew must be U.S. citizens or permanent residents.
- Ownership requirements: The vessel must be at least 75% owned by U.S. citizens.
These provisions aim to protect the U.merchant marine, support domestic shipbuilding jobs, and maintain a ready fleet for military sealift. S. On the flip side, for Puerto Rico, an island territory located over 1,000 miles from the nearest mainland port, the act creates a built-in bottleneck.
