(a) A candidate who is appointed to the Indian Administrative Service or the Indian Foreign Service on the results of an earlier examination and continues to be a member of that Service will not be eligible to compete at this examination.

In case such a candidate is appointed to the IAS/IFS after the Preliminary Examination of Civil Service Examination, is over and he/she continues to be a member of that service, he/she shall not be eligible to appear in the Civil Services Main Examination notwithstanding h^/her having qualified in the Preliminary Examination.

Also provided that if such a candidate is appointed to IAS/IFS after the commencement of the Main Examination but before the results thereof and continues to be a member of that Service, he/she shall not be considered for appointment to any Service/Posts on the basis of the results of this Examination.