California businesses or companies conducting business in California must provide a 'clear and reasonable' warning before knowingly and intentionally exposing individuals to any of the chemicals included on the Prop 65 list. The warning can take several forms, including a label on a consumer product, a sign in a workplace, or a posted notice in a rental housing unit.
Prop 65 warning labels for consumer products must contain the following:
The name of at least one listed chemical
The URL of OEHHA's Proposition 65 warnings website
Text that is the same size as other consumer information on the package, not to be smaller than 6-point type
A triangular yellow warning symbol with a bold outline and a black exclamation point in the center
Following the triangular warning symbol, the word WARNING in capital letters and bold print in the same size as the warning symbol
Warnings must be provided one year after a new chemical is added to the Prop 65 list. Regarding the prohibited discharge of listed chemicals into drinking water sources, businesses have 20 months from when a new chemical is listed to comply.