This is a carousel. Use Next and Previous buttons to navigateSACRAMENTO — California overhauled its rules for when businesses can operate during the coronavirus pandemic, imposing a statewide system that will allow for partial openings in areas where the disease is under better control.Under the plan, unveiled Friday by Gov. Gavin Newsom, counties will be placed into four color-coded tiers — purple, red, orange and yellow, in descending order of severity — based on the prevalence of the coronavirus in their communities and gradually move through those levels. Restrictions on business and...…This is a carousel. Use Next and Previous buttons to navigateSACRAMENTO — California overhauled its rules for when businesses can operate during the coronavirus pandemic, imposing a statewide system that will allow for partial openings in areas where the disease is under better control.Under the plan, unveiled Friday by Gov. Gavin Newsom, counties will be placed into four color-coded tiers — purple, red, orange and yellow, in descending order of severity — based on the prevalence of the coronavirus in their communities and gradually move through those levels. Restrictions on business and...WW…