https://www.speechanddebate.org/wp-content/uploads/Sept2019-Congress.pdf
https://www.dropbox.com/s/h8qb57eisuqia5b/Peachtree%20Ridge%20Legislation%20Addendum.pdf?dl=0
These deadlines are set in Tabroom for technical purposes. Always consult the invitation or tournament notices for official policies about deadlines and procedures.