Got caught by police!!

Today at midnight 1am, Police stopped my bike(originally from ap) in taminadu and asked for an NOC.

Recently I saw in Google that,upto 11months we can ride the bike without noc.So,I told the same to the police but he told it is only for 21 days.So he fined me.

Now my question is how can I know for sure that it is 21 days and not 11 months.Because in the whole internet,it is saying 11months.Even If it is 11 months,how can I prove it to the police next time.Because if I say that I looked in Google he will it is wrong information.

So,please help me how to tackle these situations 🙏