| Many rape victims can wait years before they come forward |
California Governor Jerry Brown has signed legislation ending the US state's 10-year statute of limitations on rape.
| Cosby, one of America's best-known comedians, denies multiple allegations of sexual assault |
But it will not work retroactively, or help those who accuse Cosby of crimes committed more than 10 years ago.
Dozens of women have accused the comedian of sexual assaults dating from the 1960s to the 1990s.
Cosby, who starred in the long-running sitcom The Cosby Show, has denied the accusations, saying his sexual encounters were consensual.
He is due to go on trial in June 2017 charged with sexually assaulting a woman in Philadelphia in 2004.