from the persons desirable to join the organization on deputation basis, the petitioner submitted his application for joining the ONGC as a Security Officer. The petitioner in terms of the options circulated vide the notice from the ONGC had opted that in the event he is appointed as the Security Officer he would opt for the pay as prescribed for the post by the ONGC. Thereafter, the case of the petitioner was duly considered by the authorities of the ONGC and he having found to have satisfied the requisite eligibility criteria, vide a communication dated 09.06.2008 the authorities of the ONGC requested the Director General of Police, Assam to inform the persons so selected for appointment on deputation basis the terms and conditions that was so applicable to them and in the event the terms and conditions so prescribed were acceptable by the persons, whose names were included in the said communication dated 09.06.2008, including that of the petitioner, to direct them to join the respective work centres mentioned against them. In respect of the petitioner, it was mentioned that he was being proposed to be appointed on deputation as a Security Officer in the scale of pay of Rs. 12000-17500 and to be posted under the In-charge Guwahati (Liaison Office), ONGC. The petitioner having accepted the terms and conditions has circulated including the pay as mandated for the post in question, the petitioner accepted the same and accordingly, he was released from the 2nd APTF Bn, Lumding vide the communication dated 16.01.2009 issued by the Deputy Secretary to the Government of Assam, Home (A) Department. Accordingly, the petitioner on his such release joined against the post of Security Officer under the ONGC on deputation basis on 01.02.2009. The petitioner, thereafter continued in his services and on completion of one year of services against the deputation post, the Government of Assam having