The planned split between two national leagues had been forgotten, and the regional FAs became the lords of the tournament, which was expanded to 48 clubs.

They variously chose to promote, re-elect, or invite clubs to fill the spots they had been granted to.

Atalanta, Enotria Goliardo, Grifone GC, Sampierdarenese, GS Bolognese, Pro Caserta, SPES Genova, Trevigliese and Alessandrina were admitted to the 1a Categoria.

Amatori Giuoco Calcio Torino, Pastore, Ausonia Pro Gorla, Legnano, Saronno, Varese, Pavia, Carpi, Mantova, and Nazionale Emilia had been previously added to the championship by the Regional FAs.

According to season 1919-20's FIGC rules in case of two teams sharing same position a playoff should have been played.