Wrong.
The Constitution of the Confederate States of America
Article I, Section 9
(4) No bill of attainder, ex post facto law, or law denying or impairing the right of property in negro slaves shall be passed.
The Constitution of the Confederate States of America SPECIFICALLY OUTLAWS all governments under the Confederacy from EVER ending slavery - which is what's so damned laughable about the revisionists "state's rights" claimed excuse for rebelling against the Union. The Confederate states would have had no "right" to alter their slave holding status under the Confederate Constitution.
Thanks; I missed that.
Walt