Barisan Nasional (BN) will give way to Amanah in the by-elections for the Pulai parliamentary and Simpang Jeram state seats in Johor on Sept 9.
BN chairman Ahmad Zahid Hamidi said the decision was made in the spirit of political collaboration in the coalition government.
"We respect equality in the unity government and we know that the Pulai parliamentary seat belongs to Amanah, which is a political partner in the government, and they are the incumbent.
"The Simpang Jeram state seat also belongs to Amanah. So in the spirit of the Madani government, we support both seats to be contested by Amanah," he told reporters in Kuala Lumpur.
The by-elections for the Pulai parliamentary seat and the Simpang Jeram state seat are being held due to an unexpected vacancy following the death of incumbent Salahuddin Ayub on July 23.
Salahuddin, 61, who was also the domestic trade and cost of living minister, died at Sultanah Bahiyah Hospital in Alor Setar, Kedah, after undergoing a brain haemorrhage surgery.