Harrington will then select three wildcards to complete his 12-man lineup which will look to defend the trophy won in dominant fashion in Paris last year.
"I am pleased that the (European Tour) tournament committee agreed to the change of wild card numbers," Harrington said in a statement.
"I have spoken to a number of people regarding the ninth player automatically qualifying for the team and in my experience, a player is more comfortable when he has qualified, hence my reasoning behind this change."
The European qualification race will begin with the 2019 BMW PGA Championship and conclude at the same event in Sept. 2020.
"I am also delighted to be starting and ending the process at the BMW PGA Championship at Wentworth," Harrington added.
"It is one of our most prestigious events, played at an iconic venue and the home of the European Tour itself, and will help give a real narrative to the qualification race."
(Reporting by Hardik Vyas in Bengaluru; Editing by Christian Radnedge)
