The championship was disputed in three phases:[1][3]
Qualifying round: All eighteen teams played each other in a single-round robin system, with the ten best teams advancing to the Blue Series and the eight worst going on to compete in the White Series.
Blue Series: The ten teams played each other in a double round-robin system, and the team with the most points won the title.
White Series: The eight teams played each other in a double round-robin system, and the team with the fewest points was relegated.
Updated to match(es) played on September 30, 1956. Source: RSSSF.com Rules for classification: 1) points; 2) goal difference; 3) wins; 4) number of goals scored.
Updated to match(es) played on December 30, 1956. Source: RSSSF.com Rules for classification: 1) points; 2) goal difference; 3) wins; 4) number of goals scored.
Updated to match(es) played on February 10, 1957. Source: RSSSF.com Rules for classification: 1) points; 2) goal difference; 3) wins; 4) number of goals scored.
Updated to match(es) played on February 10, 1957. Source: RSSSF.com Rules for classification: 1) points; 2) goal difference; 3) wins; 4) number of goals scored.