MUMBAI, Aug. 21 -- After serving a legal notice, former NCP national secretary Sachchidanand Singh has sent a reminder notice to party national president Sunetra Pawar, seeking her re-election as NCP chief. Singh has given the party leadership 15 days to act on his notice, failing which he has warned that he may approach the appropriate authorities, including the Election Commission of India (ECI) and the courts. The reminder notice was issued after the NCP leadership did not respond to Singh's July 9 legal notice, in which he alleged that Sunetra's election as party president was "unconstitutional". According to the notice, the election violated provisions of the party constitution that mandate a prescribed electoral process for the appointment of the national president. Singh has alleged that the required process was not followed when Sunetra was elected at party's national convention on February 26. The notice assumes significance against the backdrop of an ECI communication dated July 27, which flagged discrepancies in the changes made by Sunetra Pawar to the NCP's National Working Committee (NWC) after she assumed charge as party president. The poll panel also sought supporting documents to substantiate the changes. In his fresh, five-page notice issued on August 17, Singh argued that the party leadership's continued silence on his earlier notice could be construed as an admission of the alleged illegality. He demanded that Sunetra Pawar's election be declared null and void. Singh has reiterated his demand that both Sunetra Pawar's election as NCP president and the revised list of office-bearers of the NWC be declared null and void. He has also sought the appointment of a duly empowered Central Election Authority or Returning Officer to conduct fresh organisational elections in strict accordance with the party constitution. The NCP has been facing internal turbulence since the death of Ajit Pawar in a plane crash on January 28. After Sunetra took over, fresh differences emerged after the names of Praful Patel and Sunil Tatkare were omitted from the revised list of NWC office-bearers to the ECI. The party sought to defuse the controversy by describing the list as provisional and assuring that it would be revised at the next meeting. However, no revised list has been issued so far....