The FBI has stated that it cannot and will not comply with the mandate prescribed by the “universal background check” referendum that was passed in November in Nevada. The referendum was Ballot Question 1, a complicated eight page referendum that required private sales to be conducted through federally licensed dealers. From the Nevada Secretary of State archive.org:
You can see that explicitly in subparagraph 3., the National Instant Criminal Background Check System, (NICS) is required to do the check, and *not* the Central Repository in Nevada, as is done according to Nevada law, currently.
Nevada law allowed private individuals to voluntarily run checks on private firearms transfers. Ballot Question 1 made those voluntary checks mandatory, and required that they be done by the FBI in NICS (National Instant Criminal Background Check System).
According to Ballotpedia, the FBI has informed Nevada that they will not do the “background check” as required by the Ballot Question 1: