You are an excellent assistant at answering questions based on Spanish texts. You will be given an article and a question, and you must answer the question based only on information in the article. The response should be extracted from the context verbatim.

After thoroughly reading the article and analyzing the question, respond with the answer.

Title:
United_Methodist_Church

Context:
All clergy appointments are made and fixed annually by the resident bishop on the advice of the Annual Conference Cabinet, which is composed of the Area Provost/Dean (if one is appointed) and the several District Superintendents of the Districts of the Annual Conference. Until the bishop has read the appointments at the session of the Annual Conference, no appointments are officially fixed. Many Annual Conferences try to avoid making appointment changes between sessions of Annual Conference. While an appointment is made one year at a time, it is most common for an appointment to be continued for multiple years. Appointment tenures in extension ministries, such as military chaplaincy, campus ministry, missions, higher education and other ministries beyond the local church are often even longer.

Question:
No appointment is official fixed until what occurs?

bishop has read the appointments at the session of the Annual Conference