1. A geographically defined zone along an international or regional boundary that is formally recognized and regulated by government authorities
The official border area between the two countries is heavily patrolled by customs officials.
A área de fronteira oficial entre os dois países é intensamente patrulhada por oficiais alfandegários.
2. A designated region near a political boundary where specific laws, regulations, or trade agreements apply
Residents of the official border area enjoy special tax benefits.
Os residentes da área de fronteira oficial desfrutam de benefícios fiscais especiais.