Naviance Says submission through Mail - please help

I am little confused as Naviance says the application submission is through mail. I thought that all the UC apps are submitted electronically through UC application portal. Please help. If UC Davis requires submission through mail, what are the documents that goes along with that mail?
Should I take a print out of the PDF that from the UC app and send through mail? What other documents I should include? Also, if the post-mark is on Nov 30, will that be enough even if the actual mail reaches UC Davis a week later?

@LKPUTRA Don’t worry about what Naviance says. UC Davis does not want any transcripts or recommendations or any other paper work. Just do the application on their site and send your ACT/SAT scores. That’s all you need to do.