In this version of the code, if the player's current game mode is already creative, the code will not reset the timing or update the player's last use time, and will simply return.
This means that the player will not receive any warning messages and their game mode will not be changed back to their previous game mode after 35 minutes.
The limitation of use is set for 35minutes in creative and the command can't be run for 1Hour after the last use.