India, July 16 -- The Department of Space (DoS) has introduced stricter rules for resignations and voluntary retirements of scientists and engineers working on ISRO's key missions, including the Gaganyaan human spaceflight programme.

The move follows the departure of more than 100 scientists in recent months, raising concerns over talent retention in India's flagship space projects.

According to an internal memorandum issued on July 14, resignation and voluntary retirement requests from personnel associated with critical national missions will no longer be approved routinely. The new directive also withdraws the powers earlier given to centre directors to accept such requests, bringing the approval process under tighter central oversigh...