Judge Mitchell Beckloff has given Michael’s mother, Katherine Jackson the right to challenge the executors of her son’s estate, without losing her share in the Michael Jackson Family Trust.
Katherine’s lawyers have said that she wanted more say in the estate even though Michael’s will contained a “no contest” clause to the family trust.
The family trust gives her more than $1m (£606,000) a year.
The money from the estate is to be used to support herself and Michael’s three children and the amount was approved by a judge in Los Angeles in August.
Michael’s estate is estimated to be worth $400m (£246m).
Judge Mitchell Beckloff ruled on Friday that Katherine Jackson would not violate the “no contest” clause if she were to challenge decisions of the estate’s administrators.