[jeffersondem]

“Confederate constitution.”

Do you mean this:

Article I Section 9(1)
The importation of negroes of the African race from any foreign country, other than the slaveholding States or Territories of the United States of America, is hereby forbidden; and Congress is required to pass such laws as shall effectually prevent the same.

[DoodleDawg]

Do you mean this:

Yes. It specifically protects slave imports from the U.S.