Top legal eagles have been hired by both the sides to put forth their views before the Election Commission.
Two former law ministers and a former Additional Solicitor General -- M Veerappa Moily, Salman Khurshid and Mohan Parasaran are representing the Sasikala camp.
The O Panneerselvam side is being represented by senior Supreme Court advocates C S Vaidyanathan, S Krishnakumar and B Srinivasan.
During the first half of the hearing, the OPS camp questioned V K Sasikala's elevation to the party top post, besides seeking to freeze the party symbol, before the poll panel, it is learnt.