UNCLOS is a major international treaty that was adopted and signed in 1982. It provides rules, principles and guidelines for virtually every ocean use. UNCLOS prescribes EEZs (see definition for EEZ) over which a state has exclusive rights to marine resources. After a state ratifies UNCLOS, they have a 10-year period in which to claim an extended continental shelf area of which they have exclusive rights to. Russia, Canada, Norway and Denmark have all filed claims to extend their EEZs.