A bill that grew out of criticism over then-Gov. Arnold Schwarzenegger halving a sentence for a son of former Assembly Speaker Fabian Nunez was amended to require the governor to notify local law enforcement authorities within 10 days of a commutation, instead of 30, a legislative aide said Wednesday. AB 648, co-authored by Assemblymen Marty Block, D-Bonita, and Nathan Fletcher, R-San Diego, was changed Monday to conform with rules regarding pardons, which require a 10-day notice.