Only 10 of the 24 NASL member-teams chose to field a squad for the 12 game regular season and 6 team, 3 round playoffs.

No longer 4 by 16 feet (h x w), the goals now measured a more proportionate 6.5 by 12,[1] with a board or plexiglass panel above the cross bar instead of netting.

These modifications were consistent with the rules of the competing Major Indoor Soccer League,[2] which had begun operation in December 1978.

Like most American sports, the clock would count down to 00:00 rather than up to "full time" as was done in association football.

Indeed, two playoff series, including the Championship Final between Tampa Bay and Memphis, would need to be settled by means of a mini-game.