How can I deal with a neighbor taking up the common area parking spot

I live in a housing society in Ahmedabad,Gujarat that was built in 2010.My society has 15 houses and our builder of the society also lives in 1 of the houses in my society. He has 4 cars and parks his 2 cars in common area of the housing society. Whenever any other resident of society parks their car in that common area parking spot, he says “This is My spot, nobody should park this car in My spot”. I told him that it is not his permanent parking spot and per RERA Act 2016,any member of the society can park his or her car in this common area parking spot but he is behaving like a bully and not allowing us to park our car there. He says that RERA Act was introduced in 2016 and he built this society in 2010 and hence any new RERA Act 2016 parking guidelines doesn't apply to this society. So I kindly ask what is the solution to this issue?