What are an employer's obligations regarding SDSS? Select all that apply.
A. An employer must maintain copies of the required SDSS for all hazardous chemicals used in the facility.
B. An employer must make SDSS readily accessible during every work shift to employees when they are in their work areas.
C. An employer must write a customized SDS for each hazardous chemical used in the facility.
D. An employer can only provide SDSS in printed format.