The FIA revised the provisional calendar by making a return of the South Korean race possible after a one-year absence, pending final approval for the May 3 date.
The Mexican Grand Prix, not held since 1992, will return as the third-last season race on November 1.
The season starts on March 15 in Australia and runs until the November 29 Abu Dhabi Grand Prix.
If South Korea also returns, the 2015 campaign will have one more race than 2012 which consisted of 20 grands prix.
As expected, FIA rescinded a standing restart after a safety car phase over safety concerns from teams.
The virtual safety car was approved after tests following Bianchi's accident at a wet race in Japan when his car of now defunct Marussia crashed into a recovery vehicle, deployed to lift away the Sauber of Adrian Sutil, during a double yellow flag stage.
"It will normally be used when double waved yellow flags are needed on any section of track and competitors or officials may be in danger, but the circumstances are not such as to warrant use of the safety car itself," the FIA said.
-AAP