Apartment common area being sold

Hi All

I reside in an Apartment with around 97 flats. The standing committee has decided to sell the common area for 2 flat owners for parking space. As per my knowledge the common area in an apartment is an undivided property of all the flat owners and cannot be modified or sold unless with the consent of all the flat owner. Nor the committee has any rights to modify or sell the common area. 

Can someone please help me clarify and let me know if my understanding is correct.

Thank you

Regards

Rajendra