Where recruitment to any post or service is made in accordance with the West Bengal Regulation of Recruitment in State Government Establishments and Establishments under Public Undertakings, Statutory Bodies, Government Companies and Local Authorities Act, 1999 (West Ben. Act, XIV of 1999) and rules or notifications issued there under and not through the Public Service Commission, West Bengal, the upper age-limit shall be raised to 40 years. … as per FD Memo No. 11653-F(P) dated 30.12.2011 while amending West Bengal Services (Raising of Age limit) Rules, 1981.
https://wbxpress.com/upper-age-limit-raised-to-40-years-for-entry-into-govt-jobs/