By defining the borders of the border region, it has effectively created a separate and independent international zone between Mexico and the United States, which internationalize the EPA with this agreement. They also provided a way to obtain financing outside of the normal financial flows of the U.S. Congress, such as the United Nations or private donors like David Rockefeller. The 1996 Protocol is a separate agreement that modernized and updated the London Convention following a thorough review of the Agreement in 1993. With its entry into force, the 1996 Protocol will replace the London Convention. Since July 2006, 22 states have adhered to the 1996 protocol. Four more parts are needed for the protocol to come into force. In 1983, the governments of the United States and Mexico signed the La Paz Agreement on environmental protection, improvement and protection at the U.S.-Mexico border. The border region has been defined as the area within 100 km of the geographic border between the two countries. Nine years later, the environmental authorities of both countries published the Integrated Border Environment Plan (IBEP), which involved six working groups, including air, water, hazardous and solid waste, pollution prevention, emergency planning and emergency measures and enforcement.
The implementation of IBEP has been criticized for not being asked by the public to participate in the development of the plan and because little attention has been paid to natural resource and environmental health issues. These shortcomings led to the “Borders XXI” programme, which ran from 1996 to 2000. In 2001, U.S. and Mexican authorities explored ways to improve environmental planning efforts in the region and launched border 2012 to address environmental issues in the region for the next 10 years. IbWC focuses on the sanitation, distribution and protection of natural river waters and the distribution of borders between the United States and Mexico.  Contracts and agreements focus in depth on the distribution of water from the Rio Grande, the Colorado River, the Tijuana River, La Santa Cruz and other water components flowing into these rivers. These bodies of water must be maintained on both sides at their own expense. The IBWC also protects land along the river from flooding caused by dike and flood projects.  Each country has expanded its IBWC divisions to include organizations within its flood, pollution and waste deterrence department.
These divisions include sewage treatment plants, dams,, emergency services, data recording services and field offices.  The La Paz/Frontier XXI Agreement, signed in 1983 by Presidents Ronald Reagan and Miguel de la Madrid, this revolutionary agreement created a framework for environmental cooperation, promoted by successive presidential administrations in Mexico and the United States. The U.S. Environment Agency and Mexico`s Ministry of Environment and Natural Resources (formerly SEMARNAP, now SEMARNAT) are responsible for finding solutions to problems related to air, water and land pollution along the border.