Registration details can be found in the TLD reference chart.
For transfers in, the domain registrant needs to send an email to firstname.lastname@example.org with the following content:
I, the domain owner of exct.ly, hereby confirm that I wish to transfer the domain exct.ly to the account email@example.com.
This email must be sent from the domain owner's email address entered in the registry database.
For transfers out of OpenSRS, the domain registrant will send same email, except firstname.lastname@example.org would be replaced with the gaining registrar’s email.