; polysiloxanes, di-Me, hydroxy-terminated, ethoxylated propoxylated (CAS No. 64365–23–7); and oxirane, 2-methyl-, polymer with oxirane (CAS No. 9003–11–6) (provided for in subheading 3824.99.92) Free No change No change On or before 12/31/2024 . 4663. Methyl palmitate-stearate, hydrogenated Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.24.75 Fatty acids, C16–18, methyl esters (methyl palmitate-stearate, hydrogenated) (CAS No. 85586–21–6) (provided for in subheading 3824.99.92) Free No change No change On or before 12/31/2024 . 4664. Olfine E1010 Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.24.76 Mixtures of ethane-1,2-diol;2,4,7,9-tetramethyldec-5-yne-4,7-diol (CAS No. 9014–85–1) (provided for in subheading 3824.99.92) 1% No change No change On or before 12/31/2024 . 4665. Certain non-halogenated flame retardants Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.24.77 Non-halogenated flame retardants based on organic phosphinates aluminum;diethylphosphinate (CAS No. 225789–38–8) phosphoric acid;1,3,5-triazine-2,4,6-triamine (CAS No. 218768–84–4) (provided for in subheading 3824.99.92) Free No change No change On or before 12/31/2024 . 4666. Flame retardants Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.24.78 Non-halogenated flame retardant based on organic phosphinates aluminum;diethylphosphinate (CAS No. 225789–38–8) phosphoric acid;1,3,5-triazine-2,4,6-triamine (CAS No. 218768–84–4) boron zinc oxide (CAS No. 12767–90–7) (provided for in subheading 3824.99.92) Free No change No change On or before 12/31/2024 . 4667. Preparations based on acetyl hexapeptide-8 and pentapeptide-18 Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.24.79 Mixtures of propane-1,2,3-triol (CAS No. 56–81–5)