As per the Prohibition of Child Marriage Act, 2006, a child marriage is:

Under Section 3(1) of the Prohibition of Child Marriage Act, 2006, every child marriage is voidable at the option of the contracting party who was a child at the time of the marriage (unless it falls under the special categories of void child marriages in Section 12, such as where the child is enticed away or trafficked). A petition for annulling a child marriage under Section 3 must be filed in the district court before the child filing the petition completes two years of attaining majority. An adult contracting party does not have the option to have the marriage declared voidable on this ground.