The California Supreme Court today rejected legal challenges to the state's new Senate and congressional maps.
The two separate lawsuits were rejected by identical 7-0 votes, said Lynn Holton, court spokeswoman.
The court's decision ended the first hurdle to implementing boundary lines that were drawn this year, for the first time, by a 14-member citizens commission created by voter passage of Proposition 11 in 2008.
More hurdles remain, however.
A coalition of Republican-backed groups is spearheading a referendum drive aimed at placing the new Senate maps before voters next year.
GOP opponents say the new lines tend to give Democrats an advantage and could allow the majority party to gain the two additional seats necessary to gain a two-thirds majority in the state Senate.
Raising taxes or fees requires a two-thirds vote of both legislative houses.