The championship was disputed in a double-round robin system, with the team with the most points winning the title. Originally, the team with the fewest points would be relegated, but the last-placed team of that year, Jabaquara, appealed to the sports courts, alleging that since it was one of FPF's founding members, the federation rules allowed the club to never be relegated. as a consequence, fellow founding members Comercial, that had been relegated in the previous year and had failed to be promoted, found itself invited back into the First Level.[1][2]
Updated to match(es) played on January 28, 1951. Source: RSSSF.com Rules for classification: 1) points; 2) goal difference; 3) wins; 4) head-to-head points.