The Constitutional Court's ruling on Prime Minister Prayut Chan-o-cha occupying an army residence, scheduled for Dec 2, could ease him gently from power, said Jatuporn Prompan, chairman of the red-shirt United Front for Democracy against Dictatorship (UDD).
He was responding to the court's pending ruling in a case lodged by the opposition in November last year.
The opposition said Gen Prayut's tenancy of the army house was a conflict of interest and took the case to court.
It said Gen Prayut, who is also the defence minister, should have moved out of the army residence in Bangkok when he retired as army chief on Sept 30, 2014, and that by staying on free of charge, he defied army regulations, which disqualifies him as prime minister.
Speaking in a live broadcast on the Peace Talk programme via Facebook, Mr Jatuporn said if Gen Prayut was disqualified as prime minister by court order, it could provide him with a gentle way out of his current political predicament.
Gen Prayut has come under pressure from anti-government protesters to step down.