The government has said it would not promulgate the interim statute unless the arms management process starts.
According to the Constitution, which has 167 articles, all executive powers as well as those enjoyed by the King in the previous Constitution, now vest upon the prime minister.
Nepal's major parties on Wednesday failed to break an impasse over the formation of a new government as efforts to strike a deal on sharing of power proved futile. During crucial talks in Prime Minister Girija Prasad Koirala's residence here, the Maoists rejected a proposal from Nepali Congress and the CPN-UML to amend the interim constitution to remove a provision requiring two-thirds majority for forming or unseating the government.
Maoist supremo Prachanda, whose party has registered a surprise victory in recent Constituent Assembly polls, on Sunday declared that he would lead the next government in Nepal.As the interim constitution does not have the provision for electing a President, he is expected to head the government as Prime Minister. Prachanda also assured the voters that Nepal would be declared a republic in the first meeting of the Constituent Assembly.
Interestingly for a section which had faith in gunpowder in the past, the Maoists have chosen a Buddhist monk as one of their independent representatives.
Squabbles over Islamic law and Kurd autonomy delayed the drafting of the interim constitution.
Nepal on Sunday adopted its new fully secular and democratic constitution, achieved after seven years of painstaking deliberations, amid violent protests by minority Madhesi groups over a seven province federal structure.
Prime Minister Narendra Modi's advice to Nepal's warring political parties on the Constitution-making process was on Thursday criticised by the media in Kathmandu which termed it as "breaching of diplomatic norms".
In a fresh twist to the decades-old Kashmir dispute, the "president" of Pakistan-occupied Kashmir has said that talks can be held with India on any proposal for an independent state of Jammu and Kashmir.
Prime Minister Narendra Modi had invited ASEAN leaders to be the chief guests.
Rejecting the allegation of adopting "big brotherly" approach towards Nepal, India on said it respects its sovereignty and wants to see the crisis resolved through consensus.