The tournament regulation document says the following (my emphasis, original document here 😞
QuoteWhen the round time reaches 65 minutes, the organizer should announce the end of the round. Players can no longer start a new dynasty phase, and the following procedure begins:
◊ When the round time reaches 65 minutes, each player has an opportunity to concede to their opponent. If neither player concedes, then they continue playing until they reach the end of the next regroup phase or until the round time reaches 75 minutes, whichever comes first.
◊ When the round time reaches 70 minutes, the organizer announces the last chance for players to turn in their match slips. If players turn in their match slip after this time, the player who lost will receive a modified loss instead .
◊ When the round time reaches 75 minutes, all gameplay immediately ends. Any players who still have not finished their game do not continue any further, and instead must follow the procedure listed under the “Emperor’s Judgment” below. The player who wins will receive a modified win instead .
This seems to imply that after 70min, the winner gets 10 points, the loser gets 0. After 75, the winner gets 6, the loser gets 1. This entails that there is no case when both players have the modified win condition.
That document is from last October, but I think we haven't ever played like that locally. We're behind the times I guess?!