<Li> It also functions as an effective instrument for changes in the society or social welfare . </Li> <Li> Through public interest litigation, any public or person can seek remedy on behalf of the oppressed class by introducing a PIL . </Li> <P> A PIL may be filed against state government, central government, municipal authority not any private party . But, private person may be included in PIL as' Respondent', after concerned of state authority . i.e. a private factory in Mumbai which is causing pollution then public interest litigation can be file against government of Mumbai, state pollution central board including that private factory of Mumbai . </P> <P> The court must be satisfied that the Writ petition fulfils some basic needs for PIL as the letter is addressed by the aggrieved person, public spirited individual and a social action group for the enforcement of legal or Constitutional rights to any person who are not able to approach the court for redress . Any citizen can file a public case by filing a petition: </P>

The concept of indian judiciary has been taken from