North Korea's ruling party stipulated its new No. 2 post under leader Kim Jong Un as "deputy of the general secretary," when it revised its rules in January, sources familiar with the matter said Thursday.Speculation is growing that the leader's closest aide has already assumed the position called "first secretary" of the Workers' Party, but some pundits say the party may be leaving the post vacant in case of an emergency such as Kim's health deterioration.The ruling party amended its rules in January at its first congress in five years. Although North Korean state-run media have reported o…READ FULL ARTICLE