Rules for Jousting

Different types of Jousting

There are three different types of jousting which are: Joust a plaisance, Pas d'armes or passage of arms Jousting, and modern jousting. 

1.  Jousting rules: Knights should only run 4 courses and that is it. If a knight breaks three of his lances then he is declared the winner. 
2. If the other knight who only broke one of his lances but managed to hit his opponents helmet off in the same round then there would be a tie. 
3. If a knight breaks two of his lances by hitting his opponent and the opponent manages to hit the knight that broke his two lances off his horse then a tie will be declared.
4. If one knight hits the other knight off his horse and the horse falls but he still manages to knock over the attacking knight then the knight with the fallen horse shall be declared the winner because the faults would be on the riders and not the horse.
5. If the lances are broken crosswise then the judging will not be proper. 
6. In the four courses, if both knights break two staves, or a single stave, or they hit in the same place , a tie will be declared. If they did not hit each other at all then the judging will be that they jousted poorly.
7. If a knight drops his lance while charging the other knight must lift his lance without striking the knight with the dropped lance.
8.  There will be four judges. Two for each knight to be judged fairly.

 In Joust a plaisance people would go into elimination rounds over a couple of days. There then will be a final round which will determine the winner.

 In Pas d'armes or passage of arms Jousting, a knight will send a message to any challenger to joust at a certain place or time.
Modern jousting usually happen at fairs. In order to win, knights are supposed to shatter their lances's tip or broken off as a single piece. If the knight's lance makes contact to the opponent but does not break then the knight will be declared the winner.

Sources: http://www.medievalists.net/2015/01/07/medieval-rules-jousting/
http://www.lordsandladies.org/jousting.htm
http://hubpages.com/sports/Medieval-Jousting-Rules
https://en.wikipedia.org/wiki/Jousting