TexasCHLforum.com

well I was hoping that a more lawyerly response would come, but I'll take a crack at it.

30.05 says it won't apply if it's in regards to a concealed handgun.
So you go down to 30.06 which does apply.
in brief, 30.06 says you can orally tell someone they are not welcome with a handgun (much like someone can tell you that they aren't welcome under 30.05)

OR

They must post a sign meeting the exact requirements set fourth in 30.06.

This means, as far as 30.05 goes, a "no tresspassing" sign is sufficient to keep everyone out, including chl holders.
30.05 is NOT sufficient to keep people out only because they are carrying a concealed handgun. (i.e. a "no guns sign" isn't sufficient, as 30.05 can't apply there; only the increased wording of 30.06 does.)

In short, there is much less stringent requirements under 30.05 to post no tresspassing, than there is for 30.06. The reason for the wording is to make sure that the requirments for criminal tresspass in regards to a chl holder only matter in that instance; even though the oral requirements are similar.

(How'd I do, folks?)