Scottish Premier League

The Scottish Premier League (SPL) was the top level league competition for professional football clubs in Scotland. The league was founded in 1998, when it broke away from the Scottish Football League (SFL). It was abolished in 2013, when the SPL and SFL merged to form the new Scottish Professional Football League,[1] with its top division being known as the Scottish Premiership. A total of 19 clubs competed in the SPL, but only the Old Firm clubs, Celtic and Rangers won the league championship.
Background
For most of its history, the Scottish Football League had a two divisional structure (Divisions One and Two) between which clubs were promoted and relegated at the end of each season. However, by the mid-1970s, this organisation was perceived to be stagnant, and it was decided to split into a three divisional structure: Premier Division (formerly Division One), First Division (formerly Division Two) and a newly added Second Division. This system came into force for the 1975–76 season. This setup continued until the 1994–95 season, when a four divisional structure was introduced. This involved the creation of a Third Division, with all four divisions consisting of ten clubs.
On 8 September 1997, the clubs in the Premier Division decided to split from the Scottish Football League and form a Scottish Premier League. This followed an earlier example in England, which came into force during the 1992–93 season. This decision was fuelled by a desire by the top clubs in Scotland to retain more of the revenue generated by the game. Originally, league sponsorship money was divided proportionally between clubs in all four divisions. After the SPL was formed, its clubs retained all of its commercial revenues except for an annual payment to the SFL and a parachute payment to relegated clubs.
League info were according to Wikipedia