sentences:  "Defunct" refers to the fact of that sanctioning body in question no longer existing at the start of the racer's career or at that stage of his/her career.Depending on point totals of individual racers, winners of Grand Nationals do not necessarily win National titles.National Bicycle Association (NBA)
  
  National Bicycle League (NBL)
  
  American Bicycle Association (ABA)
  
  In 1985 the ABA experimented with dividing the district points season from one year lasting from January 1 to December 31 to three four-month-long time periods at which a racer could earn a plate number for that time period and/or their age group and could race the rest of the year with it.