Complex sentence: The organization was created as the International Boundary Commission by the Convention of 1889 Between The United States and Mexico Water Boundary, and given its present name under the 1944 Treaty for the Utilization of Waters of the Colorado and Tijuana Rivers and of the Rio Grande.
Split into simpler sentences: The organization was created as the International Boundary Commission by the Convention of 1889 between the United States and Mexico. It was given its present name under the 1944 Treaty relating to the Utilization of Waters of the Colorado and Tijuana Rivers and of the Rio Grande.