Since Delhi master plan formulated in 1962 and later it was always delayed due to some reason or other only Govt in the Delhi/Centre and DDA/MCD knows better,However people were not aware of the limitation of the act so they kept on doing what they thought was good.Ignorence can not be alibi.However peolpe who were supposed to execute this too were ingnorent,then there is something really fishy. Delhi did not became what its today its gradual process of change.Authourities will say who were in charge in past are retired so Suprime Court can ask the GoM to make a list of people who were in charge during this period be politician,DDA or MCD there name be published and since all were on govt payroll their where about could be traced(even if retired) and action should be taken to give astrong message to other. This may take time but not impossible.Govt employee & politican will thing twice.