This book comprehensively covers the entire scope of conflicting rights and duties of the fighting parties and international humanitarian relief actors in non-international armed conflicts, namely from the moment of the initiation of international humanitarian relief actions till their authorisation and throughout the consecutive stages of the delivery of relief. From the practice of frontline humanitarian negotiations, this book reconceptualizes how those rights and duties are coming into being and how compliance with agreements on humanitarian access and other international humanitarian law and international human rights norms can be ensured and/or their normativity can be strengthened.