The conduct of Julius Malema and 19 EFF MPs is being probed are Jacob Zuma was heckled in the house.
Masibulele Xaso says the presiding officer in the National Assembly should be heard without interruption.
The EFF's Mbuyiseni Ndlozi says that the party has renounced the parliamentary disciplinary process.
The Parliamentary committee has begun hearing from its first witness.
The MPs staged a walkout on Tuesday saying they won't be subjected to a 'kangaroo court' by the ANC.
Parliament's Powers and Privileges Committee says the hearing is in the public's interest.