You might be wondering why you can't just go to an Occult Mystery School and join up right away? You might wonder why you have to first get to know the others in the Order and them you, for three months, then be taken on as a Probationer for one year.
The first three months is time when you get to know more about those within the Order you want to join, and they get to know you. If someone turns up and is in a rush to quickly join, it means they haven't thought it through properly, they haven't looked into what it means to be part of an Order and they are very likely to lose interest before the three months are up. This weeds out those who like the idea of being in an Order and the mystique that it creates, and someone serious about the work ahead.
If they are still keen after three months, and the Others within the Order all agree, the Aspirant is taken in as a Probationer. They are given a basic set of tasks which help at activating the magick mind, these are often very similar in all the different Orders, as there are tried and tested methods for this. The Aspirant is also given a reading list and usually invited to most of the Orders ceremonies, although not all. The Aspirant signs an Oath, promising their own Higher Self that they will do the Great Work to completion within this Order, gaining support from and helping support the other members within. They are also sworn to keep secret all they have seen, talked about and heard within the Order and at the ceremonies.
A magical oath is a promise. When a person vows not to reveal the secrets of a magical order -- in which case, when the promise is broken, that organisation may impose sanctions on the individual, such as expelling them from the group.
But more importantly, a magical oath is a promise to one's inner or higher self, and as such, is a very potent magickal tool. Breaking that oath robs you of that tool, by proving to your self that you are incapable of making a binding promise. It sets a precedent in your subconscious mind that you don't have the willpower to see something through that you had intended. Basically, it makes you magickally impotent.
In every case of an individual breaking his or her magical oath there is evidence of the consequences borne out in his or her life, in severity proportional to the magnitude of the breach. Some spectacular falls come about as a result of deliberate and egregious oath-breaking.
The Order the oath-breaker has been expelled from need make no punishment on to them, as they have then become the victim of their own actions.
Think seriously about signing any Oaths, as they are a lesson to you and a real and true promise to your own Higher Self. Think about your real reasons for wanting to join an Order.. Is because of an egotistic reason? Is it because you are attracted to someone in the Order and fancy your chances with them if you join? Is it because you want to learn magick that you can use to influence others? Or is it just because you want to do the Great Work and become a better, more balanced Being?
Unless it is the latter, you are not ready for the commitment.
The Probationer will be 'tested' by the others in the Order. This is to find out how serious they are about belonging to the Order and to stop any traitors in their tracks. The tests can be varied in nature, but work well in providing the others a clear view of the intentions of the Aspirant and whether or not they are likely to be an oath-breaker. They might be trusted with a 'secret' that only they are told, and if this information gets spread around, then the oath-breaker is found out.
When you are trusted enough to join the Order proper and come to know the other members fully, you are initiated and welcomed in, this is when the 'real' work begins. If you are rejected from an Order as they feel you are not right for them, don't be upset by this. It just means that one or more of the members felt you weren't right for the group. Remember you are about to be let into the lives of these people and find out all the weaknesses, their fears, the things they have been through on their journey and they will help you on yours, there has to be perfect trust within an Order.
In conclusion - Don't sign oaths you aren't willing to keep, if you break it you are magickally impotent. Think very carefully before applying to join an Order.