Is it allowed to put protection roof on first floor terrace area of flat in apartment

Goodmorning. I have a flat at first floor in building apartment located in Central Mumbai suburban. This flat is registered on my name and society committee is active since last two years. Since my flat is on first floor I also have open terrace area in front of my flat hall. This is a open space and belong to me. Due to open space many times I noticed that wastage was thrown from upper floor rfesidence and falling in this area, which is trouble every time to clean. Also every time it is unsafe to seat in terrace area thinking any thing will fall from top side due anyone mistake. When I am proposing to cover this terrace area with roof, the residence on second floor are opposing and not allowing me to do so. Society committee also not taking any decision and leaving the matter to on my responsibility if I put the rooftop. My question is with all the above details, whether by indian law OR BMC law in mumbai, is it allowed for me to cover the terrace area with roof for my protection.