The 1988 regular season took place over 21 rounds between 12 February 1988 and 9 July 1988.
The top 6 teams qualified for the finals series.
Updated to match(es) played on 9 July 1988.
Source: NBL.com.au The NBL tie-breaker system as outlined in the NBL Rules and Regulations states that in the case of an identical win–loss record, the results in games played between the teams will determine order of seeding.
[2] The teams that finished the regular season 1st and 2nd had a bye into the semi-final stage.