Filling of a vacancy by a lateral transfer: The choice of filling a post by lateral move—without going through a fullfledged competitive selection process—is provided for by sec. 2.5 of ST/AI/2010/3 and does not per se violate any of the superior rules prescribing the goal of ensuring the highest standards of efficiency, competency and integrity. Nevertheless, as any discretionary decision, such course of action must not be arbitrary, capricious, tainted by improper motives, based on erroneous or irrelevant considerations, procedurally flawed or resulting in a manifestly unreasonable outcome...