"The points range from 60 points for each match of a two-Test series to 24 for each match of a five-Test series," the ICC said in a statement.
India have continued from their early success of a 2-0 win in the West Indies and are now on 240 points after wresting the maximum in both their series.
They will get a chance to build further in an upcoming two-Test home series against Bangladesh from November 14.
Sri Lanka and New Zealand are on 60 points each in the table after drawing their two-match series 1-1 while England and Australia are on 56 each after their five-match Ashes series ended 2-2.
The top two teams at the end of the league will play the final in the UK in June 2021 with the winners crowned the world Test champions.
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