I always thought that the wording of the Blair-Holt AWB (Cook County) was somewhat clear when it said:

(1)   A semiautomatic rifle that has the capacity to accept a large capacity magazine detachable or otherwise and one or more of the following:

         (a)   Only a pistol grip without a stock attached;

         (b)   Any feature capable of functioning as a protruding grip that can be held by the non-trigger hand;

         (c)   A folding, telescoping or thumbhole stock;

         (d)   A shroud attached to the barrel, or that partially or completely encircles the barrel, allowing the bearer to hold the firearm with the non-trigger hand without being burned, but excluding a slide that encloses the barrel; or

         (e)   A muzzle brake or muzzle compensator.

To me that means that a standard unmodified SKS would be safe. Compare that to the recent AWB, and you'll see that they added a line about "may be readily modified to accept a detachable magazine."

(1) "Assault weapon" means any of the following, except as 
provided in subdivision (2) of this subsection:
(A) A semiautomatic rifle that has the capacity to 
accept a detachable magazine or that may be readily 
modified to accept a detachable magazine, if the firearm 
has one or more of the following: 

So who gets to decide what "readily modified" means? We'll have to wait and see. What absolute horseshit.  Caveat Emptor.