The Act permits the President to grant a one-time extension of no more than 90 days with respect to the prohibitions’ 270-day effective date if the President makes certain certifications to Congress regarding progress toward a qualified divestiture.

Here’s last week’s full Supreme Court ruling this quote is from: https://www.supremecourt.gov/opinions/24pdf/24-656_ca7d.pdf

If Oracle and Microsoft, or basically any other western entity, purchase Tiktok from ByteDance, then this law will no longer apply. The law only applies due to ByteDance being a Chinese-based company