The JP has added 12 MPs to its ranks since September's presidential election.
The moratorium was lifted by former president Abdulla Yameen in 2014.
The ruling coalition is yet to decide on a formula for jointly contesting the parliamentary elections.
Nasheed's 13-year jail sentence was overturned after a review of the controversial terrorism conviction.
Imran was sentenced to 12 years over his speech at the 2015 May Day protest.
Chairpersons, managing directors and board members of 11 state-owned companies were dismissed.
Former president Yameen was elected as the PPM's leader at an extraordinary congress.
Discussions have started with both nations, the new foreign minister announced.
Muhthaz Muhsin was accused of conspiring to kidnap former president Yameen with a forged arrest warrant.
The Sri Lankan was detained in 2015 on suspicion of planning to assassinate the former president.
MPs Ilham Ahmed and Hussain Mohamed Latheef are the latest lawmakers to switch parties.
Former president Nasheed told Reuters the new government would scrap the "one-way treaty."
Nihan was accused of conspiring to kidnap former president Yameen with a fraudulent arrest warrant.
The Elections Commission warned MVR80 million was not enough for the parliamentary elections in March.
The former actor-comedian plans to contest in an MDP primary to seek re-election on the party's ticket.
A 13-year jail sentence handed to the former opposition leader was suspended for review.
The top court concluded a review of Sheikh Imran's terrorism conviction.
