It is the first Professional football tournament in Singapore where players work under a full-time contract.
The SFL Qualification tournament, Singapore Island Wide League or the IWL is the next tier for newly registered Football Association of Singapore clubs compete against each other to gain promotion to the SFL.
In 2018, the Prime League was dissolved, making the then called NFL the next tier followed by the IWL.
However teams from these leagues do not gain entry to SFL or IWL as the leages are not organised by FAS.
[3] Nevertheless the level of play of Cosmoleague and EFL are similar to the playing level of SFL and IWL, thus making these leagues to fall from Tier 2 to Tier 4 of the overall football league system in Singapore.