Yes to what? Which question is a valid one? Do we have to provide laws for basic human communication? This gets a little weird.

Imagine both people never said yes, and had sex - which is rather common. Is it now rape (for both)? Of course not, because rape is not just rape because someone didn’t say “yes”.

I’m seriously not sure what this law is actually doing that isn’t already covered by other laws.

Edit: I should have read the article fully before typing. This is pretty much what everyone assumes as consent by default. It’s not how the title suggests. Any way of showing your consent is fine. Not literally only “yes”. Good thing, because it would be absolutely awful otherwise.