The conferences were confirmed on Monday.
The conference tables were completed after the final pool round of the 2018/19 Guinness PRO14 season in April, with the teams being ordered from one to 14 based upon their final points totals, before being ranked within their respective unions.
According to the competition organisers, the criteria for placing teams in each of the two conferences were based on ensuring a competitive tournament with an equal spread of teams from each union in both conferences.
The Toyota Cheetahs won eight of their 21 pool matches last season and earned 46 log points to finish far above Zebre Rugby Club on points in conference A, while the Isuzu Southern Kings had an unlucky season in which they won two matches, drew one and suffered seven agonising defeats by seven points or less, to finish as the last-placed team in Conference B.
The kick-off date for the 2019/2020 Guinness PRO14 season will be announced in due course.
Guinness PRO 14 Conferences for the 2019/2020 and 2020/21 seasons:
Zebre Rugby Club
Isuzu Southern Kings