SDCL § 26-2-7: Blood donations by minors.

Any person of the age of sixteen years may donate blood if the potential donor obtains the written consent of a parent or guardian. Any person of the age of seventeen years or over may donate blood without obtaining the consent of a parent or guardian. However, no person may take blood for donation from any person of the age of seventeen if the parent or guardian of such potential donor specifically requests of the person taking the blood that such donation be prohibited.