I may not be asked to show my driver's license when I enter a bar in Texas but I'd better be prepared to show it per state law.
Yes, there is a law in Texas that states that people must be 21 to purchase alcohol but there is no law that states that everyone who buys alcohol must show proof that they are of drinking age.
However, the Ledge will go into session next month and you are free to write your State Rep and ask him to propose such a law.
And you are also free to write Sen. Kay Bailey Hutchinson and ask her to propose a law that would require President-Elects to show their BC before they are sworn into office.
And you are free to write letters to Chief Justice Roberts and Justices Scalia. Thomas and Alito and chastise them for refusing the Donofrio case.