yes you have to
An event that requires formal attire. A tuxedo or black suit and tie for men and formal or cocktail dress for women
a red shirt or black tie, it can be any color shirt, but make sure the tie has atleast some black if not all of it is black.
A white tie. Or, for a "stealth" look, a black tie.
No.
Yes.
No. While men wear tuxedos--well-dressed men wear a black bow tie--women have more latitude. However, black is a popular color for women's evening-wear, given its simplicity and formality.
It's a formal event.
There are many examples of black tie parties. Most weddings are considered to be black tie. As well many fundraisers will hold a black tie event. In high school most will have a Prom that will be considered black tie.
Black tie should be suitable.
white tie
white or black