What is the major issue concerning the international law

The major issue concerning the international law is its implementation within the domestic system. A State can enforce international law either by adopting the administrative measure or through legal measures, depending whether it is a civil law country or common law country. The jurisprudential approach regarding the civil law country is that whenever a state has signed a treaty, it automatically becomes a part of the domestic law and is incorporated in it. On the contrary, a common law country like Pakistan, India, Bangladesh, Srilanka and UK require formal incorporation of the international law into the national laws to ensure their applicability and  compliance.  The  problem  arises  when  the  government  is  not  ready  to  make  laws  in accordance with the international laws