We'd need either 13 countries or any number of countries that represents 35% of the EU population to oppose this law.

Last time, it was 8 countries representing 27% that opposed it. A handy voting calculator[0] gives us about 23.88% of the population using the countries listed here.

This is (was?) a less-likely scenario to stop it. One final attempt will be when all the MEPs get a chance to vote on it.

[0] https://www.consilium.europa.eu/en/council-eu/voting-system/...