We have listed below a couple of emails to and from the BOI about how to go about obtaining a 13a Visa.
It now appears that the requirements for the probationary 13a have been relaxed. (see Here)
If you look at the dates you will see that this information only days old.
Go to the link in the email and it will take you to the correct page on the BOI website

We thank the viewer who has provided this information to us and given permission for us to published it.