yotsuya said:
The color timing is baked into the interpositive which then creates the internegatives (this is usually where subtitles are added, which is why the Star Wars GOUT is subtitle free because it was taken from a newer interpositive). The internegatives strike all the prints. so on a popular movie like Star Wars, the negative gets some heavy use as they have to make more interpositives.

If I’m understanding this correctly then it explains why C4 (UK) usually provide their own custom subtitles to their telecasted films instead of the theatrical subtitles, because they’ve received a copy of the interpositive and not the internegative?