North Korea's late leader, Kim Jong-Il has been named the ruling party's 'Eternal General Secretary'.
Kim Jong-il died in December last year according to state media.
The Worker's Party has also promoted new leader Kim Jong-un to "first secretary".
North Korea intends to launch a rocket to also mark the 100th anniversary of the birth of the country's late leader Kim Il-sung. The launch is expected between 12-16 April.
The BBC reports foreign journalists were taken on Sunday to the Sohae satellite station at Tongchang-ri to see the final preparations.
US Secretary of State Hillary Clinton said on Tuesday that the rocket launch is a direct threat to regional security.
South Korea and Japan have said they will shoot down the rocket if it threatens their territory, and the Philippines has re-routed air and sea traffic.