State JD(U) spokesman and MLC Neeraj Kumar said over 170 delegates from 23 states including Jammu and Kashmir and Kerala would take part in the meeting at Rajgir in Bihar's Nalanda district.
General Secretary and MLA Shyam Rajak said the National Council meeting would ratify election of Nitish Kumar as party chief.
Kumar had taken the rein from Sharad Yadav in April this year. Kumar was the sole candidate for the post after the nomination was invited last month in the national capital and was declared elected unopposed.
The meet is expected to draw strategy for coming poll in Uttar Pradesh as well.
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Former JD(U) chief Sharad Yadav, former Union minister M P Veerendra Kumar, party's General Secretary K C Tyagi and a host of Bihar ministers and legislators would be present in the meet.
Rajgir, about 100 km from capital Patna, is a famous tourist place in CM's native Nalanda district.
The meet would discuss how to take CM's two "important achievements"- good governance and prohibition - among commoan man and take the message in other states, Neeraj Kumar said.
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Meanwhile, Bihar chief of JD(U), Basistha Narayan Singh said former Jharkhand chief minister Babulal Marandi would attend the concluding open session of party national council meeting at Rajgir on October 17.
Political resolution would be passed at the two-day national council meeting, he said.
Party representatives from as far as Dadar Nagar Haveli, Maharashtra, Jammu & Kashmir, Kerala, Uttar Pradesh would be present in the meet, Singh said.
The party state chief said the session would start at 3 PM tomorrow in which election officer of the party, Anil Hegde, would announce the unanimous election of Bihar Chief Minister Nitish Kumar as the JD(U) President which would be ratified by the national council.