Nev. Rev. Stat. § 338.520
Except with respect to any payment withheld pursuant to NRS 338.525, if:
3. A public body partially occupies one or more buildings of a public work,
the public body shall pay or cause to be paid to the contractor any outstanding payment due, including, without limitation, retainage, and any interest accrued thereon within 30 days after whichever event described in subsection 1, 2 or 3 occurs first. The amount paid must be in the proportion that the value of the portion of the public work which is used or occupied bears to the total value of the public work.
(Added to NRS by 1999, 1984)