What are 'papaya rules' in Formula 1?

'Papaya rules' are a code of conduct for McLaren team-mates Oscar Piastri and Lando Norris on the racing track. The word 'papaya' refers to the colour of the fruit that bears a resemblance to the iconic orange colour of McLaren. The drivers are often told of 'papaya rules' on radio messages during races when they are battling each other. It essentially reminds the drivers that they are free to race, but they must keep the battle fair, clean and avoid colliding. McLaren team principal Andrea Stella said both Piastri and Norris have been involved in creating the code.