How Old Do You Have to Be to Get a Tattoo in Texas?

Wikipedia mentions that a parent is allowed to have a minor's tattoo covered if it contains offensive language, gang symbols or other markings that the parent deems necessary for removal. The National Conference of State Legislatures notes that the physical presence of a parent, or proof of parentage, is required. Khou.com notes that Texas law requires tattoo shops to record the type of identification a customer shows to verify age. Only the type of ID shown is required and not the number or photocopy.