The Manipur unit of the National People's Party (NPP) instructed its members not to attend any meetings called by the Biren Singh government.
An advisory signed by NPP state president N Kayisii on Thursday emphasised that the party's national president had officially withdrawn support from the Singh government on November 17.
"Consequently, all NPP members are required to comply with this decision," Kayisii said.
The advisory also states that members must seek permission from either the state or national president before making any official statements or engaging with the media on the matter.
The directive comes in the wake of three NPP MLAs attending an NDA meeting convened by Singh at the CM secretariat on November 18.