Finally I can quote chapter and verse of the confederate constitution which shows that the document protected slavery throughout the south and safeguarded the importation of new slaves. Constitution of the Confederate States, Article I.:
Sec. 9. (I) 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. You'll forgive me if I find it difficult to interpret this phrase as safeguarding the importation of new slaves, especially since the Confederates' secession would have made it easier for the US to outlaw slavery within its own borders, thus eventually rendering the exception meaningless.
You overlook the obvious. Read it again:
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.
It's right there in black and white. The importation of slaves from the United States was specifically protected. At the time this was written there were 8 states in the United States that allowed slavery. Ending it in the U.S. would have been almost as difficult as ending it in the confederacy.