newbie tire question

[06blktj]

I have a set of 42 iroks on a yj I got through a trade on here 2 years ago. Anyways they are getting close to 25%tread on 2 and 40% or so on the other 2 but they grip really good. Also I know they have some age on them but the rubber still seems pretty soft. Someone questioned whether they are stickies this weekend but Im not sure how interco indicated sticky vs non sticky tires. Any help would be appreciated

 

[muddinmetal]

Non highway use stamp anywhere in the sidewall? Pics of tread?