IF businessman Dominic Hadeed is not released from detention soon, his health could deteriorate to the point where he suffers permanent damage or even loses his life.

That was the warning from Hadeed's legal team today as he and his wife, Genevieve, appeared via a virtual link from prison during a marathon High Court hearing over their continued detention under the State of Emergency (SoE).

Justice Vigel Paul heard more than five hours of submissions before declining to immediately fast-track the couple's constitutional challenge. Instead, he dealt with a series of procedural issues, allowing their attorneys to file an application seeking to have their medical expert recognised by the court before the matter returns on July 17.