Visitor Information

NNSS Mask and COVID-19 Testing Updates

NNSS-controlled or -leased facilities currently are setting COVID-19 safety protocols for each location based on its county’s COVID-19 Community Level data reported to the CDC.

Changes to testing and mask requirements may be reinstated if an NNSS facility’s county reports an increase to COVID-19 Community Level. NNSS hosts and sponsors will notify visitors of site access requirements based on current COVID-19 community levels for the county in which the NNSS-controlled or -leased facility is located.

COVID-19 Community Level

Mask Wearing

Screening Testing










Daily Symptom Screening

All visitors must perform a daily self-health screening prior to accessing any NNSS location. If visitors are experiencing any symptoms consistent with COVID-19, or any other symptoms that are concerning, they are not permitted on site. If a visitor begins to experience any symptoms consistent with COVID-19, or any other symptoms that are concerning while at an NNSS location, they must isolate from others, notify NNSS Occupational Medicine at 702-295-1473 or 911 if an emergency, and notify their sponsor or host.

Face Coverings

In locations where face coverings are currently required or if chosen to be worn, visitors must wear a multilayer cloth mask with a nose wire, a surgical mask or a well-fitting filtered (e.g., KF94, KN95, N95) mask when indoors while on NNSS-controlled or -leased property and in shared vehicles during times of substantial or high community transmission. Prior to wear and use of a KN95 or N95, please read the mandatory notice from OSHA.

Vaccination Attestation

Visitors must attest to their vaccination status when CDC Community Levels are Medium or High prior to accessing NNSS locations. If the visitor attests to anything other than being fully vaccinated, the visitor must provide proof of a negative COVID-19 test taken within 72 hours of their arrival.

Sponsors or hosts will coordinate this process with visitors. Below are the steps and actions visitors and sponsors or hosts must work together to complete before visitors may access any NNSS location.

  • Sponsors or hosts will email the NNSS Visitor Certification of Vaccination form to their current visitors and ask future visitors to attest and return the form prior to accessing any NNSS location.
  • Upon receipt of the form, visitors should complete and sign the form and then return it via email to the sponsor or host. E-signatures are acceptable, and photographs of the signed form are also acceptable. The sponsor or host confirms submission and status but does not retain the form as a record.
  • If the attestation status is fully vaccinated, the visitor is allowed to access NNSS locations. Visitors must have the signed attestation form with them at all times during their visit, in addition to submitting it to their sponsor or host.
  • If the attestation status is “I am not yet fully vaccinated,” “I have not been vaccinated,” or is “I decline to respond,” visitors must provide the sponsor or host proof of a negative COVID-19 test taken within 72 hours of their arrival. Both the attestation form and negative test results must be submitted to the sponsor or host. Additionally, visitors must have the signed attestation form and negative test results with them at all times during the visit.
  • Visitors may submit an FDA-authorized polymerase chain reaction (PCR) test result or a proctored FDA-authorized antigen test result. Telehealth proctored/observed tests are permitted. Self-administered home test kits are not acceptable.
  • Visit to find a testing location in Nevada or find nationwide community COVID-19 testing locations through the U.S. Department of Health and Human Services website.
  • Upon receipt and validation of the attestation form and negative test results, if needed, a visitor may access NNSS locations.
  • If a visitor is accessing NNSS locations for multiple days, they must provide an initial negative COVID-19 test taken within 72 hours of their first day on site. Thereafter, they must also show proof of a negative test taken every 72 hours during their visit. If an individual is at the NNSS Monday through Thursday, they would need to show two negative test results for that week. For instance, proof of a negative test taken on Friday is acceptable through Monday but a second negative test is required for Tuesday through Thursday.
  • If a visitor does not remain compliant with testing and their attestation status is not fully vaccinated, their badge, keys and computer access will be disabled and they may not access an NNSS location.
  • Hosts will be responsible for ensuring badges and keys are returned.

Delivery drivers, waste haulers, hazardous materials transporters, couriers, U.S. Postal Service, Federal Express and United Parcel Service employees and other “transient visitors,” meaning visitors accessing NNSS buildings or NNSS -controlled or -leased indoor worksites for less than 15 minutes who interact with very few people, are NOT REQUIRED to present a completed Certification of Vaccination Form as a condition of entry. They are required to follow all current COVID-19 safety protocols while accessing any indoor facility, such as mask wearing and physical distancing.


For more detailed information, please refer to the NNSS COVID-19 Mitigation Measures for Protection of Workers Plan.

Those traveling must adhere to state and local travel restrictions. For more information, visit the CDC’s “Considerations for Travelers” page:

For general information related to Coronavirus, please visit:

For general NNSS visitor information, please visit: