body: I know we have two types of obligation: "Obligation of means" and "Obligation of result".
  The Obligation of a government to fulfill of articles in "Constitution" is which of them?
  
  
  For example in article of 30 in Iranian Constitution:
  **"The government must provide all citizens with free-education up to secondary school, and must expand free higher education to the extent required by the country for attaining self-sufficiency."**
  
  
  The Obligation of Government to fulfill this Obligation is which type?
  
  
  
title: What type of obligation do governments have in enforcing the Constitution?