Under what conditions may Tecartus (brexucabtagene autoleucel) be temporarily stored at −80 °C?

Tecartus, normally stored at ≤−120 °C, may be stored once at −80 °C (±10 °C) for up to 90 days, remaining frozen until the patient is ready for treatment; use within 90 days or labelled expiry, whichever is earlier, otherwise discard, and never refreeze thawed product.