duration of courses

bbsadmin

I have started the A course but have registered for ABCD. In the material, it is mentioned that for each course you need 3 months. Also it is mentioned that if you fail a test you do it again until you have passed.

My question is, are there ANY limitations at all or can I just take the time I think I need to do the studies?
In other words, if I cannot complete the first course in time, because I am travelling or have other duties, the first one may take 5 or 6 months, and in this case, I would still have 3 months or more for each other course?
Or is there a time limit after which I have to pay the fee again?

Thanks