You have to carefully study the rule book above - all 258 pages.
The season ends when the SPFL Board decides that the season has ended. That cannot happen till Monday at the earliest. I include the rule book definition of a season.
Season means the period of the year commencing on the date of the first League Match in a Season and ending on the date of the last League Match in the same Season or otherwise as determined by the Board and which excludes the Close Season;
NOTE - as determined by the BOARD , not by the clubs.
League Ranking at the End of a Season C8 At the end of each Season, beginning Season 2013/2014, the Clubs shall be ranked in the League from 1 to 42 inclusive on the basis that the Clubs finishing the relevant Season in positions: C8.1 1 to 12 in the Premiership shall be ranked in respectively positions 1 to 12 in the League for that Season;
The team in position 1 namely Celtic are called the Champions
Severability A3 Each Rule shall be construed separately and, if any Rule or provision in these Rules may prove to be illegal, invalid or unenforceable for any reason, such illegality, invalidity or unenforceability shall not affect the remaining Rules which shall continue in full force and effect.
I love Rule A3 and we will have to quote it often. Within the rules there can only be one option. Don't let the chatter and distraction get to you. 11 trophies in a row.