First and foremost, all maritime activities are governed by the Harbormaster's Office. Harbor Masters (also referred to as "Capitania") oversee the operational readiness of ports, including safety, security, and environmental protection. The Harbor Master reports directly to the Secretaría de Marina (Secretary of the Navy).
Sanidad Internacional is part of the Secritaria de Salud (Ministry of Health) which administers health and sanitation inspections on all vessels. Sanidad Internacional is the first authority to go onboard to verify health certificates and carry out fumigations in accordance with regulations. Vessels are not allowed to leave port until Sanidad Internacional authorities have gone on board to check it is in compliance with these regulations.
All immigration matters are governed by the Instituto Nacional de Migracion (INM). The INM reports into the Secretaría de Gobernación, which handles certain domestic affairs and national security issues.
Quarantine inspections are carried out by the Secretaria de Agricultura, Ganaderia, Desarrollo Rural, Pesca y Alimentacion (SAGARPA). SAGARPA acts as Mexico's the department of agriculture and is charged with agricultural inspections of foreign vessels.
Customs matters fall under the authority of Aduana Mexico. This organization handles import and export requirements and oversees trade agreements and regulations. Aduana Mexico reports to the treasury department Servicio de Administración Tributaria (SAT).
Secretaria de Medio Ambiente y Recursos Naturales (SEMARNAT) is tasked with administrating Mexico's environmental protection initiatives. SEMARNAT's policies are based on sustainable development and are aimed at the conservation of ecosystems, natural resources, assets, and environmental services in Mexico.
Docking positions and dock assignments are managed by the Administración Portuaria Integral (API). In addition, the API governs Mexico's port development as well as local port operations.