County of Mendocino Order Requiring Members of the Public to Comply with California Department of Public Health Guidance for the Use of Face Coverings:
https://www.mendocinocounty.org/home/showpublisheddocument/43664/637593702356600000
California Department of Public Health Guidance for the Use of Face Coverings:
https://www.cdph.ca.gov/Programs/CID/DCDC/Pages/COVID-19/guidance-for-face-coverings.aspx