India issued notice to Pakistan for modification of Indus Water Treaty of September 1960 after dispute resolution mechanism remains in logjam for 5 years. Notice was conveyed on January 25 through respective Commissioners for Indus Waters. This is as per Article XII (3) of IWT.
India has claimed that it has been steadfast supporter, responsible partner in implementing Indus Water Treaty with Pakistan in letter and spirit. New Delhi has alleged that the actions of Pakistan adversely impinged on provisions of Indus Treaty, forced India to issue appropriate notice for its modification of the more-than-six-decade-old treaty.
source: oneindia