submitted that the notification dated 15th June 2012 was further superseded by a notice dated 18th August 2017 restoring back the situation prevalent as on the date of vacancy at the promotional posts and, therefore, the petitioners were unreasonably denied their legitimate right by an act of the authorities. In support of the contention that the Rule pertaining to promotional posts prevalent at the time when the vacancy arises should be applied, reliance is placed upon a Single Bench judgment rendered in case of Asoke Sawoo vs. State of West Bengal , reported in 2011(2) CHN (CAL) 82 . It is also submitted that though the aforesaid judgment of the Single Bench was upset by the Division Bench in case of Asoke Sawoo vs. The State of West Bengal & Ors. , reported in (2013) 2 WBLR (Cal) 229 , but the Apex Court set aside the judgment and order of the Division Bench and accepted the principles of law laid down in the Single Bench decision. It is, thus, submitted that since the vacancy arose in the year 2011 but because of the subsequent amendment having brought in the year 2012, which was withdrawn in the year 2017, the petitioners are entitled to be appointed to the promotional posts with retrospective effect and the notional benefit should be extended in commensurate with the said promotional posts.