In his four-page letter, Chowdhury said there is no clear demarcation in the roles envisaged for the Privileges Committee and the Ethics Committee, especially on exercising penal powers.
The committee headed by BJP MP Vinod Kumar Sonkar is meeting later on Thursday to adopt its draft report in what is likely to be hotly contested by opposition members of the panel.
BJP MP Nishikant Dubey has accused Moitra of asking questions, which were keyed in through her parliamentary account, at the behest of businessman Darshan Hiranandani in return for bribes.
Requests Lok Sabha Ethica Committee to give a time after November 5
Moitra has been at the centre of a political storm after a BJP MP accused her of taking bribes from a businessman to ask questions in Parliament.
The TMC MP has been accused of accepting bribe to ask questions in Lok Sabha.
BJP MP Nishikant Dubey has claimed Mahua Moitra took bribe from a businessman to ask questions in Parliament.
The protest will conclude today with a peaceful rally conducted by MGNREGA job card holders.
As per sources, the panel will act as the highest decision-making body of the bloc and start work on seat sharing, which will be finalised by September 30.
The TMC leader sought to speak under the pretext of raising a point of order.