Preparations began in September 2017 when congregations in Sri Lanka were informed that a special convention would be held the following year.
September 2017 ni wọ́n fi tó àwọn ará ní Siri Láńkà létí pé àkànṣe àpéjọ kan máa wáyé lọ́dún tó tẹ̀ lé e, àtìgbà yẹn ni ètò sì ti bẹ̀rẹ̀.