India acceded to the Convention on the Elimination of all forms of Discrimination Against Women with a Declaration (CEDAW) to Article 5(a) stating that it will implement the principle on gender-based equality only to the extent of non-interference in the personal affairs of its religious communities. The due diligence obligation in the CEDAW, which was adopted through General Recommendation No. 19 in 1992, normatively expanded Article 5 to imply an obligation on nation states to redress traditional cultural attitudes that cause gender-based violence. This article argues that the cultural nature of GBV in India converts the Declaration of India into an inconsistent reservation under public international law. This implies that India's Declaration is an egregious breach of the CEDAW's due diligence obligation. Accession to the CEDAW's Optional Protocol is advocated as a solution to this serious breach. Theoretical implications for the three-stage norm life cycle and epiphenomenal norms are presented.