India, July 17 -- The Department of Space reportedly issued a memorandum to major Indian Space Research Organisation (ISRO) centres, tightening the rules governing resignation and voluntary retirement of scientists and engineers working in critical missions including 'Gaganyaan'.

The memorandum directed these centres not to routinely accept resignation or voluntary retirement requests from Group 'A' scientific and technical personnel, PTI news agency reported. This comes amid reports of more than 100 ISRO personnel quitting the space agency across various centres in the country.

The recent spate of resignations has put the spotlight on the job roles at the space agency, including their salaries and eligibility criteria.

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