At this point, am a bit on Texas law.
Is it or is it not legal to OC in the State of Texas? Or does the Texas OC laws change in certain parts of the state?
It is not legal to OC in Texas, technically. Part of the deal to get CHL passed involved revoking OC.
Are there parts of Texas where you can OC without issue? Absolutely. Don't try it in a major metropolitan area though.