A SPECIAL closed-door judicial hearing today will determine whether orphaned Vietnamese teenager Ngo Van Ha has a right to judicial review of his status. Ha's lawyer, Pam Baker, said she received a summons yesterday issued by the Attorney-General's office calling for her to present Ha's case at a chambers hearing this afternoon. She must prove that there is a sound basis in seeking the review which could result in an order being made for Ha to be re-screened. In March 1992 Ha was screened out as a refugee. His appeal was rejected and the United Nations High Commissioner for Refugees (UNHCR) special committee for vulnerable persons advised that he should be returned to Vietnam. He has been at the centre of a running controversy in recent weeks after a High Court judge urged the authorities to consider sending him to California where relatives have said they will take him. Ha faces being returned to his home city of Nha Trang to an aunt and uncle who have told the South China Morning Post they do not want the boy to live with them. They consider Ha to be a trouble maker and an extra mouth to feed at a time when they are struggling to provide for their own two children and Ha's younger sister who is also staying with them. Mrs Baker said she was concerned that she was given only one day's notice that she would be required to make an argument as to why the application for judicial review should not be struck out. ''I believe we have a solid case and it is only fair that this boy be given another chance considering the circumstances,'' Mrs Baker said. The UNHCR chief-of-mission Jahanshah Assadi has ordered a full investigation into Ha's case and is waiting for a final report. He has asked UNHCR officers to visit Nha Trang and interview Ha's relatives to determine why they would not accept him back. Ha is at present being detained at Whitehead detention centre after being transferred there last month from Tai A Chau. His transfer sparked 31/2 days of protests by other inmates at the Tai A Chau detention centre. Hunger strikes and sit-ins were held by about 2,000 other Vietnamese on the outlying island anxious that Ha's repatriation could be the first signal that they too stood to be sent back to Vietnam. A campaign of hunger strikes is expected to start again at Tai A Chau today.