The Rivers state government has joined 10 other states in the suit challenging the naira redesign policy.
The suit was initiated by Kaduna, Kogi, and Zamfara before the supreme court, seeking to restrain the federal government from giving effect to the deadline on the use of old N200, N500, and N1,000 notes.
On February 8, the supreme court restrained the CBN from giving effect to the deadline on the use of old following an ex parte application brought by the three states.
Since then, other states have approached the apex court to be joined in the suit.
Ondo, Ekiti, Katsina, Ogun, Cross River, Lagos, and Sokoto states have joined the suit as co-plaintiffs, while Edo and Bayelsa states have joined the AGF as defendants.
At the court session on Wednesday, Emmanuel Ukala, representing Rivers, applied that the separate suit filed by the state should be consolidated with that filed by other plaintiffs.
The application was granted by a seven-member panel of the apex court.
The states, in the suit, are arguing that the implementation of the policy has caused untold hardship for Nigerians.
The court is still in session to hear all the motions brought by the states.