Car parking for married daughters

My father was the owner of the flat and after his demise, my sister and I agreed to have the flat transferred to my mother's name, and we both remain as nominee. I and my sister are both married, however after our fathers demise, we have been staying with our mother. When I started parking my car which is under my maiden name and address, our managing committee issued us a letter that I will not be allowed to park my car since I am not a residing member, they are claiming this since I am a married daughter. As per our society AGM resolution, residing members are allowed to park one car and one two wheeler in the society premises. We have been parking only one car and bike in the premises. There are cases where the car is registered in the name of a married son of certain members of the society and they are allowed parking. I have been denied parking inside the society premises as I am a married daughter. I want to know whether the society can frame such discriminatory rules and bye laws for parking? My mother has given several applications stating her daughters are residing with her and also submitted RC book to comply with society rules. Within few months after my fathers demise, they have started harrassing us with this issue to which we have explained and clarified personally with the managing committee. We have one parking space in the society, so am I not allowed to park in our parking spot just because I am a married daughter? I feel the parking rules are discriminatory and arbitrary, need your views and guidance on what to do. Thank you.