Musavat is one of the three parties that make up Azadliq (Freedom), Azerbaijan's main opposition coalition.
Azadliq claims that the 6 October polls were fraudulent and wants new polls to be held.
Azerbaijani authorities deny the accusations. However, they have admitted to some irregularities and cancelled the outcome of the vote in at least four constituencies.
Azadliq has announced plans to hold a protest rally in Baku tomorrow. It will be the third such demonstration in less than two weeks.