CITES Resolution 16.8 sets the musical-instrument certificate's validity at a maximum of three years

CITES Resolution Conf. 16.8 (Rev. CoP17), "Frequent cross-border non-commercial movements of musical instruments," operative paragraph 1(f), recommends that Parties issue musical-instrument certificates such that "a musical instrument certificate issued for a musical instrument be valid for a maximum period of three years to allow multiple imports, exports and re-exports of the instrument." This confirms, directly against the CITES primary text, a figure that had circulated in this vault only via a Tier-3 trade-press account: see claim-cites-musical-instrument-passport-certificate, which recorded the three-year duration at capture but flagged it [unverified-quant — needs primary] pending exactly this check.

The resolution frames the three-year window instrumentally, not as an expiry chosen for its own sake: the ceiling exists specifically to let one certificate cover multiple border crossings of the same instrument, sparing a touring musician from filing a fresh CITES import/export permit on every trip. The document was retrieved via a Wayback Machine mirror of cites.org, which 403s direct automated fetches — the house convention for government/treaty domains that block tooling (per 00-meta/specs/sources.md) treats a Wayback raw-content mirror as a reachable copy of the primary, not an independent secondary.