Ahmedabad: The recruitment process for about 900 principal positions in state-aided secondary and higher secondary schools started with interviews on Friday. The interview schedule varies by district and extends over a month, concluding on Feb 13. From the final merit list comprising 1,129 candidates, eligible applicants started their interviews following their school preferences. For Ahmedabad district, the interviews that started on Jan 3 will finish on Jan 30, whilst the overall process concludes on Feb 13.