The statutes you post would be relevant if Obama were born and adopted after 1981. However, if that were the case, Obama would not be eligible for the presidency due to his age.
This will show you why Obama refuses the vault BC.
http://4.bp.blogspot.com/_R-l1iejogZw/SQLJZbuSVXI/AAAAAAAABKM/9B2p--yZzDw/s1600-h/Obama+COLB.jpg
7.C..county and state or foreign born.