The originating-content threshold a good must meet to qualify for USMCA duty-free treatment.
Regional Value Content is the calculation that determines whether a good qualifies as "originating" under the US-Mexico-Canada Agreement and is therefore eligible for duty-free (or preferential) treatment among the three countries. Depending on the product, qualification can require meeting an RVC percentage threshold (calculated under a specified method, such as net cost), a tariff-shift rule (the finished good's HS classification differs from its non-originating inputs in a defined way), or both. Meeting RVC removes the MFN base rate for a qualifying entry — it does not exempt the good from Section 232 or AD/CVD, which are calculated and applied separately.
USMCA Chapter 4 (Rules of Origin) and its product-specific rules annex, implemented in US law via 19 U.S.C. 4531 et seq.
For a specific entry's rate, the free USMCA Qualification Check gives you the stacked, cited answer.