[BeHoldAPaleHorse]

Consular notification is an agreement between the United States and other countries.

Yes, the Vienna Convention on Consular Relations.

Some countries have mandatory consular notification and others are voluntary. Mexico is mandatory.

Because they are also a party to the VCCR.

[Marine Inspector]

Yes, the Vienna Convention on Consular Relations.

No, this is outside of the Vienna Convention and deals strictly with illegal immigration.

[texastoo]

Mexico has so many crooks in the U.S. that they have a consular office in almost 50 states. No other country has this many offices.