how to you translate "Dress Code: Black Tie" into Spanish?

Question

on an invitation how would you write "Dress Code: Black Tie" in Spanish

Answer 1

Absolutely non of the previous answer... "Vista Informal", means "informal wear" "Corbata Negra" is a bad Google translation

The correct answer is: 1) Vestimenta formal, 2) Gala. Believe me, Spanish is my mother language
Cheers.

Answer 2

código de vestir: corbata negra......or perhaps.....modo de vestir: corbata negra

Answer 3

Vista informal, corbata negra obligatario.