The 20th Artistic Gymnastics World Championships were held in Fort Worth, United States, in 1979. In November 1977 the 55th FIG Congress, held in Rome, changed the cycle of world championships: since 1979 they were to be held each two years, and the pre-Olympic ones were to be qualifications for the Olympic tournament. The first 12 teams in the team competition of the 1979 World Championships were invited to participate in the 1980 Summer Olympics.
References
1979 World Artistic Gymnastics Championships Wikipedia(Text) CC BY-SA