From the Document: " State and local public health officials will decide how to implement these activities and how to advise specific people, or groups of people, to be tested.  Contact tracing will be conducted for close contacts (any individual within 6 feet of an infected person for a total of 15 minutes or more) of laboratory-confirmed or probable COVID-19 [coronavirus disease 2019] patients.  Remote communications for the purposes of case investigation and contact tracing should be prioritized; in-person communication may be considered only after remote options have been exhausted.  Testing is recommended for all close contacts of confirmed or probable COVID-19 patients.  Those contacts who test positive (symptomatic or asymptomatic) should be managed as a confirmed COVID-19 case.  Asymptomatic contacts testing negative should self-quarantine for 14 days from their last exposure (i.e., close encounter with confirmed or probable COVID-19 case).  If testing is not available, symptomatic close contacts should self-isolate and be managed as a probable COVID-19 case.  Asymptomatic close contacts who are not tested should self-quarantine and be monitored for 14 days after their last exposure, with linkage to clinical care for those who develop symptoms."
Centers for Disease Control and Prevention: https://www.cdc.gov/