The plan to revert to the 2015 format of three knock-out sessions in which all eligible cars run to the end was derailed by Jean Todt, president of governing body the FIA.
Sources say he was not prepared to be dictated to by the teams, so he did not present that option when the decision to change was put to a vote of the F1 Commission, which includes all teams, the FIA, F1 commercial boss Bernie Ecclestone and representatives of the circuits, sponsors and tyre suppliers.
Instead, Todt offered the choice of a slightly amended elimination format - with the first two sessions slightly extended and only the third session running as 2015 - or to stick with the new rules