MissMEL, you can rejoin any time if you finished your probation period and if you had a clean record... You can e-mail the ccsc and ask for a rejoiner form, easy! You pretty much skip the whole process as far as I remember from what a friend told me!
SS, if you are interested you can read my blog, I wrote about everything (joining, training, flying, living in Dubai etc.) You can find it under selinastories.wordpress, hope it helps and gives you some insight!
