The Puerto Rico Boundary Line Agreement, also known as the Puerto Rico Boundary Line Treaty, is an agreement that defines the boundaries of Puerto Rico with its neighboring islands, specifically the United States Virgin Islands and the British Virgin Islands. The Boundary Line Agreement was signed between the United States and the United Kingdom on July 2, 1928. This treaty was primarily established to resolve any disputes or conflicts that may arise regarding the territorial waters and boundaries of Puerto Rico and the neighboring islands. The agreement aimed to ensure clear demarcation of the maritime borders to prevent any conflicting claims or issues concerning fishing rights, navigation, and resource exploration in the surrounding waters. The Puerto Rico Boundary Line Agreement defines the specific coordinates, latitude, and longitude points that mark the boundaries between Puerto Rico, the United States Virgin Islands, and the British Virgin Islands. It provides a precise line in the sea and demarcates the territorial waters of each party involved. It is important to note that there is only one Puerto Rico Boundary Line Agreement, which was signed in 1928. However, there have been discussions and negotiations regarding maritime boundaries in the region since then. These discussions have mainly focused on adjusting or clarifying the precise boundaries between Puerto Rico and its neighboring islands. While there may not be different types of Puerto Rico Boundary Line Agreements, these discussions may lead to potential amendments or modifications to the existing agreement in the future.