Who is responsible for Paying Corpus Fund in Resale?

I recently purchased a flat in Bangalore. The owner's association is asking me to pay a corpus fund even though my previous owner had already. This is the law they passed in the 2018 AGM meeting: "The AMC proposed to collect a Corpus Fund of 60,000 rupees from the new owners to become a member of the association". My concerns: 1. Is it legal to collect corpus fund from new owner in resale? 2. Do we need to pay additional amount to become a member of the owner's association? Shouldn't it be by default? 3. If the law was amended to the byelaws, should it be approved by the registrar to be abided or not? 4. They threatened to stop my facilities if I don't pay the corpus fund, even though I have been paying maintenance of 7000 rupees every month. And they cut off my power supply for 4 hours.