The Egyptian parliament has rejected calls from the Irish Government to release Ibrahim Halawa and has accused Ireland of "unacceptable interference".
The Dublin man has spent three years in prison in Egypt and his trial has been postponed 14 times.
Last month, both houses of the Oireachtas passed cross-party motions calling for his release.
On Sunday the speaker of the Egyptian parliament read a statement saying Mr Halawa was charged with assaulting police, disrupting roads and endangering the safety of citizens during a protest in Cairo in 2013.
Mr Halawa's solicitor has said that the Egyptian parliament's statement is a political statement and "has no basis in law, nor is it a direct response to the application for Ibrahim's release".
Darragh Mackin said that no evidence has been presented by the state of Egypt to support the allegations against Mr Halawa.
He also said that no finding has been made against Mr Halawa by Egyptian courts.
Speaking on RTÉ's Drivetime, Mr Mackin said an application will be made to press for Mr Halawa's release under the Egyptian Presidential Decree Law 140 and he called on Irish authorities for support.
He said: "What Ibrahim is about to embark on is an official request for his release and deportation and it's at that time that we will be seeking the Irish Government to put all efforts into securing his immediate release.
"We will be seeking that the Taoiseach, at the very highest level, opens that line of communication with the President and ensures that all pressure is being put on to have Ibrahim deported."
Mr Mackin said that the Halawa family is not hopeful that there will be a development in Mr Halawa's case at his next trial date in October.
The Department of Foreign Affairs earlier said it would not be appropriate for it to comment on assertions made by third parties.