Car Parking Allotment by Builder and Approved by Society

Hello Team, I have taken flat in Mumbai Suburban area under MOFA in 2016. while buying FLAT we took flat with CAR Parking and paid for same. So after formation of Society in 2017. Society takes further charge of all open space and car parking area. As my society has 10 Parking slots out of 7 is Stilt Parking Slot for and 3 is Visitor parking Space https://image.prntscr.com/image/I9tInfNHQs_rw-ftzQQzqw.png Attach screenshot for more ref. of OC plan copy. So we have put this point in Special General Meeting to get this approved slot of car parking which was allocated by the builder to members reassigned by society. and this is approved by 2/3 majority of society members. The society has also issued permanent parking allotment letter for same which was assigned by the builder. Now as curiosity how can I make this parking allotment permanent as again if someone challenge after few years. Like getting approval from the register or anything not sure how can I make this permanent, so I need here valuable feedback from expert peoples. Thank you.