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  (b) 45 percent under the build-down method.

5. A change to subheadings 3006.60 through 3006.80 from any other subheading.

Chapter 31.

1. A change to heading 3101 from any other heading.

2. A change to subheadings 3102.10 through 3105.90 from any other subheading.

Chapter 32.

1. A change to subheadings 3201.10 through 3202.90 from any other subheading.

2. A change to heading 3203 from any other heading.

3. A change to subheadings 3204.11 through 3204.90 from any other subheading.

4. A change to heading 3205 from any other chapter.

5. A change to subheadings 3206.11 through 3206.50 from any other subheading.

6. A change to headings 3207 through 3212 from any other chapter.

7. A change to headings 3213 through 3214 from any other heading.

8. A change to heading 3215 from any other chapter.

Chapter 33.

1. A change to subheadings 3301.11 through 3301.90 from any other subheading.

2. A change to heading 3302 from any other heading, except from heading 2207.

3. A change to heading 3303 from any other heading.

4. A change to subheadings 3304.10 through 3307.90 from any other subheading.

Chapter 34

1. A change to heading 3401 from any other heading.

2. A change to subheadings 3402.11 through 3402.19 from any other subheading.

3. A change to subheading 3402.20 from any other subheading, except from subheading 3402.90.

4. A change to subheading 3402.90 from any other subheading.

5. A change to subheadings 3403.11 through 3403.19 from any other subheading, except from headings 2710 or 2712.

6. A change to subheadings 3403.91 through 3403.99 from any other subheading.

7. A change to subheadings 3404.10 through 3405.90 from any other subheading.

8. A change to headings 3406 through 3407 from any other heading. 

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  Chapter 35.

  1. A change to subheadings 3501.10 through 3501.90 from any other subheading.

  2. A change to subheadings 3502.11 through 3502.19 from any other subheading outside that group, except from heading 0407.

  3. A change to subheadings 3502.20 through 3502.90 from any other subheading.

  4. A change to headings 3503 through 3504 from any other heading.

  5. A change to subheading 3505.10 from any other subheading.

  6. A change to subheading 3505.20 from any other heading.

  7. A change to heading 3506 from any other heading.

  8. A change to subheadings 3507.10 through 3507.90 from any other subheading.

  Chapter 36.

  A change to headings 3601 through 3606 from any other heading.

  Chapter 37.

  1. A change to headings 3701 through 3703 from any other heading outside that group.

  2. A change to headings 3704 through 3706 from any other heading.

  3. A change to subheadings 3707.10 through 3707.90 from any other subheading.

  Chapter 38.

  1. A change to subheadings 3801.10 through 3807.00 from any other heading.

  2. A change to subheadings 3808.10 through 3808.90 from any other subheading, provided that 50 percent by weight of the active ingredient or ingredients are originating.

  3. A change to subheadings 3809.10 through 3824.90 from any other heading.

  4. A change to heading 3825 from any other chapter, except from chapter 28 through 37, 40, or 90.

  Chapter 39.

  1. A change to headings 3901 through 3915 from any other heading, provided that the originating polymer content is no less than    50 percent by weight of the total polymer content.

  2. A change to subheadings 3916.10 through 3917.31 from any other subheading.

  3. A change to subheadings 3917.32 through 3917.33 from any other subheading outside that group.

  4. A change to subheadings 3917.39 through 3918.90 from any other subheading.

  5. (a) A change to subheadings 3919.10 through 3919.90 from any other subheading outside that group; or

   (b) A change to subheadings 3919.10 through 3919.90 from any other subheading provided that there is a regional value content of not less than:

     (1) 35 percent under the build-up method, or 

page 603    Peru

   (2) 45 percent under the build-down method.

6. (a) A change to subheadings 3920.10 through 3920.99 from any other subheading; or

  (b) No change in tariff classification is required, provided that there is a regional value content of not less than:

   (1) 35 percent under the build-up method, or

   (2) 45 percent under the build-down method.

7. A change to subheadings 3921.11 through 3921.90 from any other subheading.

8. A change to headings 3922 through 3926 from any other heading.

Chapter 40.

1. (a) A change to subheadings 4001.10 through 4001.30 from any other chapter; or

  (b) A change to subheadings 4001.10 through 4001.30 from any other subheading, provided that there is a regional value content of not less than 30 percent under the build-down method.

2. (a) A change to subheadings 4002.11 through 4002.70 from any other heading, except from heading 4001; or

  (b) A change to subheadings 4002.11 through 4002.70 from heading 4001 or from any other heading, provided that there is a regional value content of not less than 30 percent under the build-down method.

3. A change to subheading 4002.80 from any other subheading.

4. A change to subheadings 4002.91 through 4002.99 from any other heading.

5. (a) A change to headings 4003 through 4004 from any other heading, except from heading 4001; or

  (b) A change to headings 4003 through 4004 from heading 4001 or from any other heading, provided that there is a regional value content of not less than 30 percent under the build-down method.

6. A change to headings 4005 through 4017 from any other heading.

Chapter 41.

1. (a) A change to hides or skins of heading 4101 that have undergone a tanning (including a pre-tanning) process that is reversible from any other good of heading 4101 or from any other chapter; or

  (b) A change to any other good of heading 4101 from any other chapter.

2. (a) A change to hides or skins of heading 4102 that have undergone a tanning (including a pre-tanning) process that is reversible from any other good of heading 4102 or from any other chapter; or

  (b) A change to any other good of heading 4102 from any other chapter.

3. (a) A change to hides or skins of heading 4103 that have undergone a tanning (including a pre-tanning) process that is reversible from any other good of heading 4103 or from any other chapter; or

  (b) A change to any other good of heading 4103 from any other chapter.

4. A change to subheadings 4104.11 through 4104.49 from any other subheading.

5. (a) A change to heading 4105 from any other heading, except from hides or skins of heading 4102 that have undergone a tanning (including a pre-tanning) process that is reversible, or from heading 4112; or 

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   (b) A change to heading 4105 from wet blues of subheading 4105.10.

  6. (a) A change to heading 4106 from any other heading, except from hides or skins of heading 4103 that have undergone a tanning (including a pre-tanning) process that is reversible, or from heading 4113; or

   (b) A change to heading 4106 from wet blues of subheadings 4106.21, 4106.31 or 4106.91.

  7. A change to heading 4107 from any other heading.

  8. (a) A change to heading 4112 from any other heading, except from hides or skins of heading 4102 that have undergone a tanning (including a pre-tanning) process that is reversible, or from heading 4105; or

   (b) A change to heading 4112 from wet blues of subheading 4105.10.

  9. (a) A change to heading 4113 from any other heading, except from hides or skins of heading 41.03 that have undergone a tanning (including a pre-tanning) process that is reversible, or from heading 4106; or

   (b) A change to heading 4113 from wet blues of subheadings 4106.21, 4106.31 or 4106.91.

  10. A change to subheadings 4114.10 through 4115.20 from any other subheading.

  Chapter 42.

  1. A change to heading 4201 from any other heading.

  2. A change to subheading 4202.11 from any other chapter.

  3. (a) A change to goods of subheading 4202.12 with an outer surface of plastic from any other heading; or

   (b) A change to goods of subheading 4202.12 with an outer surface of textile materials from any other chapter, except from headings 5407, 5408 or 5512 through 5516 or tariff items 5903.10.15 through 5903.10.25, 5903.20.15 through 5903.20.25,      5903.90.15 through 5903.90.25, 5906.99.20, 5906.99.25, 5907.00.05, 5907.00.15 or 5907.00.60.

  4. A change to subheadings 4202.19 through 4202.21 from any other chapter.

  5. (a) A change to goods of subheading 4202.22 with an outer surface of plastic sheeting from any other heading; or

   (b) A change to goods of subheading 4202.22 with an outer surface of textile materials from any other chapter, except from headings 5407, 5408 or 5512 through 55.16 or tariff items 5903.10.15 through 5903.10.25, 5903.20.15 through 5903.20.25,      5903.90.15 through 5903.90.25, 5906.99.20, 5906.99.25, 5907.00.05, 5907.00.15 or 5907.00.60.

  6. A change to subheadings 4202.29 through 4202.31 from any other chapter.

  7. (a) A change to goods of subheading 4202.32 with an outer surface of plastic sheeting from any other heading; or

   (b) A change to goods of subheading 4202.32 with an outer surface of textile materials from any other chapter, except from headings 5407, 5408 or 5512 through 5516 or tariff items 5903.10.15 through 5903.10.25, 5903.20.15 through 5903.20.25,      5903.90.15 through 5903.90.25, 5906.99.20, 5906.99.25, 5907.00.05, 5907.00.15 or 5907.00.60.

  8. A change to subheadings 4202.39 through 4202.91 from any other chapter.

  9. (a) A change to goods of subheading 4202.92 with an outer surface of plastic sheeting from any heading; or

   (b) A change to goods of subheading 4202.92 with an outer surface of textile materials from any other chapter, except from headings 5407, 5408 or 5512 through 5516 or tariff items 5903.10.15 through 5903.10.25, 5903.20.15 through 5903.20.25,      5903.90.15 through 5903.90.25, 5906.99.20, 5906.99.25, 5907.00.05, 5907.00.15 or 5907.00.60.

  10. A change to subheading 4202.99 from any other chapter. 

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11. A change to subheadings 4203.10 through 4203.29 from any other chapter.

12. A change to subheadings 4203.30 through 4203.40 from any other heading.

13. A change to headings 4204 through 4206 from any other heading.

Chapter 43.

1. A change to heading 4301 from any other chapter.

2. A change to headings 4302 through 4304 from any other heading.

Chapter 44.

1. A change to headings 4401 through 4421 from any other heading.

Chapter 45.

1. A change to headings 4501 through 4504 from any other heading.

Chapter 46.

1. A change to heading 4601 from any other chapter.

2. A change to heading 4602 from any other heading.

Chapter 47.

1. A change to headings 4701 through 4707 from any other heading.

Chapter 48.

1. A change to headings 4801 through 4807 from any other chapter.

2. A change to headings 4808 through 4811 from any other heading.

3. A change to headings 4812 through 4817 from any other heading outside that group.

4. A change to subheadings 4818.10 through 4818.30 from any other heading, except from heading 4803.

5. A change to subheadings 4818.40 through 4818.90 from any other heading.

6. A change to headings 4819 through 4822 from any heading outside that group.

7. A change to heading 4823 from any other heading.

Chapter 49.

1. A change to headings 4901 through 4911 from any other chapter.

Chapter 50.

1. A change to headings 5001 through 5003 from any other chapter.

2. A change to headings 5004 through 5006 from any heading outside that group.

3. A change to heading 5007 from any other heading.