Apartment complex No CC signs
I live in Omaha, Nebraska, and I have a friend who lives in an apartment complex that has signs posted prohibiting CC. These signs are placed on the street leading in to the series of apartment buildings, not on or in the buildings, but on the public street.
I understand (and disagree) with a business having the right to post these signs but can an apartment complex legally restrict our right to CC on their premises?
Can I CC in my friend's apartment? Do I have to disarm when on these premises?
I just don't understand how an apartment complex can legally prohibit a state sanctioned action.
I am not looking to fight the property management company over this, but if anyone here has some legal insight to the situtation, please let me know.