Hmmmm … That depends on how the picture department will handle the convertion, no?
If they re-render the video, so the running time is unchanged, you indeed don’t have to do anything.
If they are going to “pull” the video (play the 25fps @ 29.97fps), then you also need to pull your audio.
That would be highly unprofessional - the thing would run as a kind of slowmo’isch show then.
If someone would deliver something like that to pro post house, or a broadcast station - it would be declined for sure!
This thing needs to see a motion compensated conversion. Picture and final mix altogether.
Don’t get me started …
But I’ve seen it happening many-many times.
One of the last animated shows I did was rendered in 24fps.
The reason givin’ was that 24fps was easier to convert to US Standards.
Obviously there was a problem for the European Broadcast market, which is 25fps.
So we had to pull all of our audio.
Once the problem sank through they began to investigate the so-called “easier to convert”-excuse.
Turned out that rendering 24 frames per second of show was much cheaper than rendering 25 frames per second.
So it was a budget-issue. Which I can understand because it was a 52 episodes high-end animated show with very detailed graphics.
That show I am talking about was sold to pretty much any broadcaster.
Including Cartoon Network, Nickelodeon, Canal+, ProSieben and many others. +50 countries worldwide.