1. When wearing another bands t-shirt, try to keep the same genre or influence.

2. The ironic concert t-shirt is the big exception. if you wear a Culture Club or Michael Bolton t-shirt to a Cure show you will get many compliments.

3. There is a sliding scale of the obscurity of the band vs. the genre.
for example: A Tapes ‘n Tapes shirt could be worn to any rock show.

4. When wearing a old concert t-shirt to a newer tour by the same band, it is prefered to wait at least eight years. too soon will show you to be lame, but to follow this guide will give you street cred as a long time fan.

5. It is also a violation to wear any shirt of any band members former band or side project to the current incarnation of that band members show.

6. It is a violation to wear the shirt you just bought at that same concert. Especially when it is over whatever you had on before.

7. You may not wear a new concert t-shirt for 2 weeks (especially the next day)

8. It is a violation to wear a concert t-shirt you purchased from the band at a second show on the same tour.

9. No Beatles, Bob Marley or Jimi Hendrix t-shirts, unless you actually went to one of their concerts.

10. It is a violation to wear a concert t-shirt that has been signed by any member of the band.