What is the maximum amount of cc's saline implants can be overfilled to in the state of Illinois? I can't get a straight answer!

There is no law regarding this.You can overfill as much as you want but at some point they will break, so that's why there is a range. Overfilling or underfilling is NOT recommended and may void the warranty. 

Saline implants are essentially a silicone shell that is filled by a Plastic Surgeon with sterile saline during the Breast Augmentation procedure. Each shell is made to contain a certain volume of saline, with a degree of adjustability. There is a minimum volume of saline recommended by the implant manufacturer to prevent wrinkles in the implant, which could leading to folding of the implant and breakdown of the shell and then implant failure. There is also a maximum fill volume, also determined by the manufacturer, which prevents failure of the valve and shell which could be caused by the pressure of the saline inside the implant. Between the minimum and maximum fill volumes is a range that can be used to adjust for asymmetries between breast sizes that a patient might have. If the minimum and maximum fill volumes determined by the manufacturer are not followed, then the risk of implant failure increases (and the implant warranty is voided). There is no government law regarding this that I am aware of.