I don't believe the scoreboard clock has ever been official. I believe it is kept by designated officials on the field. They coordinate during the game but this was the last play.
Here is what I found doing a search
AI Overview
The official game time in college football is kept by designated on-field game officials, not the stadium scoreboard or the television broadcast clock. [
1,
2]
Official Timekeeping Rules
- Game Officials: The referee, side judge, back judge, or line judge track the official timing of the game. [1, 2]
- The Game Clock Operator: A stadium clock operator runs the visible scoreboard clock, but they must follow signals and take direction from the assigned on-field officials. [1]
- Discrepancies: Neither the scoreboard nor the TV broadcast is the ultimate legal arbiter of time. If a review happens, replay officials rely on a direct, dedicated camera feed synced specifically to the official timing system used by the conference and crew rather than standard public feeds. [1, 2, 3, 4]
If you are looking into this because of a specific game or a recent replay controversy, let me know which
matchup or rule you'd like to explore further.