It's probably a fire code or insurance thing. I've lived lots of places where you can't have a grill or hibachi on your patio. In an apartment, your fire could leave dozens dead or homeless so the rules are a tad stricter.
Same thing happened to us in Heritage Grove....only it was the fire inspector who said it. They can also lay a fine on your apartment owner who then legally can pass it on to you. Go with charcoal I guess lol
It really depends on the place... i've lived in apartment complexes that are very strict. I even had a small empty gas can for my scooter on my porch and they went crazy over it. Live in a duplex now and have made fires, grill with propane, and have a 6 gal gas can right around the corner ... didn't even care