Skripkina says the commission should have waited for the parliament's go-ahead before making a decision.
In an interview with RFE/RL's Kyrgyz Service, Aitbaev cited other irregularities that, in his view, make the CEC ruling "illegal."
"Should [election commission members] have invited [Aidar] Akaev to their session, he or his representatives would have been able to defend his interests," Aitbaev said. "Since that did not happen, the right a lawmaker has to defend his or her interests have been directly violated."
The commission voted on October 5 to strip Aidar Akaev of his legislative mandate, arguing that he no longer lives in the country.