For a Nevada driver under age 21, what blood alcohol concentration triggers an administrative license suspension?

A common social-drinking figure that the manual does not use as the under-21 line. This answer substitutes a common social-drinking threshold for the printed 0.02% under-21 figure.

This is the adult illegal per se limit, and the manual sets a much tighter figure for drivers under 21. This answer reaches for the 0.08% number drilled into every DUI public-service ad and remembers it as the single legal limit that applies to every driver.

The manual's under-21 threshold is 0.02%, not this lower figure. This answer halves the printed 0.02% under-21 limit on the assumption that any measurable drink at all triggers action, which sounds strict enough to be right.