Legal Question in Landlord & Tenant Law in Illinois

Your question is confusing because first you say the storage right is in the decree and then you seem to say it or part of it is not. Further, the rights may be specifically defined or not -- the rights would have to be reviewed. That being said, assuming the rights are in the decree if he is abusing those rights (and by that I would include, as an abuse, making the kind of mess you are talking about that could be a safety hazard), you may have to go back to court to modify the decree. Assuming you had counsel in the divorce, that is the first person to contact because if the rights were poorly defined (such as not requiring a limitation on amount, what kind of stuff, compliance with keeping them neat and orderly.....) the attorney may need to go back in for further restrictions on the right or, if the decree allows it, a revocation of the rights if the abuse has been flagrant and is creating some kind of safety hazard.