Unfortunately accreditation is not a 1 session job. You are required to be competent (usually easy to achieve) but also experienced which happens over many sessions until a couple of accredited committee members are happy. This is not a finite time and depends on the person and frequency of use. Things are better than they were with many like yourselves interested enough to put the time into it. I myself wish to be at the observatory as often as weather allows in order to help achieve this.