I've noticed that different launches of the Soyuz launcher have a variety of logos depicted on the side of the fairing and boosters.
- What do the logos in the different positions signify?
- Who decides what goes where?
- Is there any informative log of the various logos for different flights?
In the above example, there is what looks like the Flag of Spain, red text (Союз - Cyrillic Soyuz) and another icon to the left of that text. There's also a square blue/white logo on the bottom near one of the boosters.
In the above there is what looks like the logo of the Russian Federal Space Agency.