The Commission's notice came after complaint from the AIADMK's V K Sasikala faction which alleged that the Panneerselvam camp was projecting its electric pole symbol as two leaves symbol to mislead voters.
The Commission had itself carried out investigations before issuing the notice.
"Now, therefore, the Commission has decided to afford you an opportunity to explain your position in the matter," the notice said. It has sought a reply by April 3 morning.
While Sasikala camp will contest on the "hat" symbol as AIADMK (Amma), the O Panneerselvam camp is using the 'electric pole' symbol and will be called AIADMK (Puratchithalaivi Amma).
E Madhusudhanan of the OPS camp today filed his nomination at R K Nagar.T T V Dinakaran of the Sasikala faction and Maruthu Ganesh of DMK will also be contesting the bypoll.
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