Ministers do not need to ask permission from Northern Ireland, Scotland or Wales before triggering Article 50, the Supreme Court has ruled.
The UK's most senior judges said the Government was not legally compelled to consult devolved legislatures.
Steve Aiken OBE, UUP said: “We desperately need to get a functioning government here to enable us to get things done because this is on of the most important things that is going to affect Northern Ireland for the next decade and beyond.”
The Government lost its appeal on Tuesday after arguing it did not need to seek a Parliamentary vote on starting the Brexit process. A bill is thought to be heading to Parliament later this week.