Q: Do the mailed copies of letters of recommendation need to reach you by the 24th?

Printer-friendly versionSend by email

Or is it ok just to submit the electronic ones by the deadline if the physical copies arrive a few days later?

Yes, this would be apprechiated. But, if the application is complete and eligible the application will be passed to evaluation even the mailed letters of recommendation are not present on June 24th.
Please provide them in due course.