My question involves landlord-tenant law in the State of: California

My issue is that i am living in my apartments and the office has informed me that I must take down my flag, so I did, but they told me I could have it on a pole, now they are telling me that I have to take this one down as well, it is in the lease to have nothing attached to the outside of the building but I tried to look up the law about it as much as I can and from what I read it says that I can fly the flag as long as its in the proper form (not upside down, in bad weather, torn ect...) Please help me out I only have a few days to figure this out, I need to know if I'm in the wrong or not, as a veteran I only want to display my pride in the thing I went and fought for, thank you in advance.
-Ryan