now if you want to see an amendment that would ban civil unions and other contracts then read the one in Virginia
"That only a union between one man and one woman may be a marriage valid in or recognized by this Commonwealth and its political subdivisions. This Commonwealth and its political subdivisions shall not create or recognize a legal status for relationships of unmarried individuals that intends to approximate the design, qualities, significance, or effects of marriage. Nor shall this Commonwealth or its political subdivisions create or recognize another union, partnership, or other legal status to which is assigned the rights, benefits, obligations, qualities, or effects of marriage.[64]"
NC recognizes other contracts, does not mention anything about civil unions. the bann is against legally recognizing marriage of the same sex which is already illegal to do. I think they wanted to make marriage only under the church but that idea was quickly rejected and the motion failed in State congress.