Although there were probably as many jousting rule "sets" as there were tournaments in the Middle Ages, here's how King Alfonso XI of Castile did it in the 14th century:

http://www.medievalists.net/2015/01/07/medieval-rules-jousting/

Enjoy!


T.

Hm, I'm thinking are the sources for this set of rules solid enough, however, probably the book is solidly backed up with references...