Being members of a league at a particular level also affects eligibility for Cup, competitions.
Before the top level of Thai football league, Thai Premier League was constituted in 1996, the Football Royal Cup was the football competitions of Thailand at that time.
The Thailand football competition system before 1996 is listed below:
In 1916, Football Association of Thailand was found Yai Cup (ถ้วยใหญ่, i.e. "big cup") and Noi Cup (ถ้วยน้อย, i.e. "small cup") for the purpose of annual football competitions in Thailand.
in 1963, Because of the abundant football clubs in Thailand then the Football Association of Thailand changed the name of Yai Cup (ถ้วยใหญ่) to the Kor Royal Cup (ถ้วย ก.) and changed the name of Noi Cup (ถ้วยน้อย) to the Khǒr Royal Cup (ถ้วย ข.) and added the Khor Royal Cup (ถ้วย ค.) and the Ngor Royal Cup (ถ้วย ง.) to the Football Royal Cup competitions.
In 1996 season, The Thai Premier League, The top level of football league was constituted by Football Association of Thailand rather than Kor Royal Cup. and FAT also found Division 1 League in the next season (1997).
Kor Royal Cup The trophy contested in an annual Super Cup competition match between the champions of Thai Premier League and the runners-up of Thai Premier League or Thai FA Cup
The Thailand football league system in 1996-1998 season before Division 2 League and Provincial League was created is listed below: