Complex sentence: It was played from 25 April till 30 September of 1969 under the home/away match system and for the first time, the teams were not splited in zones, playing in a straight round system.
Split into simpler sentences: It was played from 25 April till 30 September of 1969 under the home/away match system. For the first time, the teams were not splited in zones, playing in a straight round system.