 Tamil Nadu uses the water and the land, and the Tamil Nadu government has been paying to the Kerala government for the past 50 years 2.5 lakhs as tax per year for the whole land and 7.5 lakhs per year as surcharge for the total amount of electricity generated.The validity of this agreement is under dispute between the States of Kerala and Tamil Nadu.As of 2013 the matter is pending before a Division Bench of the Supreme Court.