Pacheco is currently undergoing six months' imprisonment for slapping a government officer.
"Miccky has to apply for it (attending the Assembly). There is no restriction on him. We can allow him if he applies," Arlekar told PTI.
Earlier in the day, ruling BJP said Pacheco should be allowed to participate in the session.
The monsoon session of Goa assembly is scheduled from July 27 to August 14.
He has already indicated that he wants to attend the session as he has filed nine Legislative Assembly Questions.
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Pacheco, who was the Minister for Rural Development agency, had to resign after his conviction. He surrendered before a court here on June 1 and was sent to jail after being on the run for two months. Earlier, the Supreme Court had upheld his sentence.
Goa BJP chief Vinay Tendulkar said in the morning that Pacheco should not be stopped from attending the session.
"He is representing his constituency and there are several issues in that area which need to be discussed in the House," said Tendulkar.