You are contradicting what was written on savetheinternet.in. I don't know which is more accurate. FWIW I haven't seen any minimum speed requirement. I've only seen that broadband has a minimum speed. And I've seen ISPs advertise "high speed Internet" to get around it.
They got busted for high speed internet thing. Currently, all 3 major providers -- Airtel, BSNL, Reliance adhere to rules. All the new ones like Tikona do too. Can you show me a live example of a lower speed internet available anywhere?
The rules regarding minimum speed for 3G/2G/LTE are in spectrum bid documents.