Giving the league a miss will be Northeast United FC, Odisha FC, Punjab FC and Indian Arrows.
The preliminary round will kick off in the last week of January. Teams will play on a home and away basis against other teams within a group.
The winners of each group along with the best second-placed team between Group A and C would qualify for the final round.
However, if reserve teams of ISL clubs finish as winners or runners-up in any group, the position will be passed on to the next non-ISL team.
In the final round, four qualified teams will play at the central venue on a ‘single-leg’ league system. Eventually, the winners will qualify to the next edition of I-League.
All the teams have cleared Hero Second Division League club licensing process of 2019-20 season except Lonestar Kashmir, who have been granted a special exemption by the league committee as they could not fulfil the criteria entirety due to reasons beyond their control.
Meanwhile, six teams including reserve teams of four teams are slated to make their debut in the second division league this season. They are as follows: FC Bengaluru United, Rajasthan FC, Indian Arrows (reserves), Punjab FC (reserves), Hyderabad FC (reserves) and Mumbai City FC (reserves).
The groups of the preliminary round:
Group A: Lonestar Kashmir FC, Punjab FC (reserves), Garhwal FC, Rajasthan FC, ATK (reserves), Jamshedpur FC (reserves).
Group B: Mohammedan Sporting, Bhawanipore, Indian Arrows (reserves), Hyderabad FC (reserves), Bengaluru FC (reserves), Chennaiyin FC (reserves).
Group C: ARA FC, Mumbai City FC (reserves), FC Goa (reserves), FC Bengaluru United, FC Kerala, Kerala Blasters (reserves).