In India, the "sine qua non" for mandamus is the existence of a statutory public duty incumbent upon the person or body against whom the mandamus is sought. There must equally co-exist a corresponding right in the petitioner entitling him to claim the enforcement of such public duty. These two preconditions form the foundation for the issue of mandamus. The primary scope and function of mandamus is to "command" and "execute" rather than to "enquire" and "adjudicate". It cannot be issued to change the decision of a body so as to suit the petitioner. Obligations which are not of statutory nature cannot be enforced by mandamus. The writ petition is not maintainable when a remedy provided for under the Code of Civil Procedure is available. For example, the High Court cannot entertain writ petitions for mandamus to the Government who fails to deposit and pay in the requisite time an enhanced compensation account as ordered by a lower Court. The petitioners in this case would be directed to approach the executing Court for appropriate relief.