[10.] The learned counsel further submits that although according to the State respondents, counting of past service of 55 RMSA Teachers was before the issuance of the Mizoram Government Employees (Counting of Past Service) Rules, 2020 (Rules of 2020), the Rules of 2020 is not applicable to the case of the petitioners inasmuch as, Clause 5 of the Rules of 2020 provides for counting of one third of the past service rendered by Work Charge, Contract, Provisional or any adhoc/officiating employee as specified under Rule 2 of the Rules of 2020 upon regular appointment to substantive sanctioned post in the feeder post/grade, as regular service for the purpose of determining eligibility for promotion to the next higher post/grade, including promotion through Limited Departmental Examination. Whereas, in case of the petitioners, it is not a case of regular appointment to the same substantive sanctioned post but a provision provided as per the Notification dated 19.07.2013 for counting of past services rendered in adhoc/deficit or CSS service continued by regularization into Government Service without any break which can be counted as qualifying service for the purpose of pay upgradation to Senior and Selection Grade. He thus submits that the writ petitions may be allowed as prayed for.