The eligibility for lateral entry at Jadavpur University is 50% in diploma. If you have the required percentage you can sit for JELET. A valid rank will be considered for admission. 

The number of seats for lateral entry at Jadavpur University is limited. So, in order to get selected, you will need to score higher ranks. Otherwise, you will have to go to the Govt. colleges like JGEC, or KGEC.