▁definition . ▁ ▁Che v ron ▁is ▁one ▁of ▁the ▁most ▁important ▁dec isions ▁in ▁U . S . ▁administrative ▁law , ▁and ▁has ▁been ▁c ited ▁in ▁thousands ▁of ▁cases ▁since ▁being ▁issued ▁in ▁ 1 9 8 4 . ▁ ▁Background ▁Under ▁the ▁Supreme ▁Court ' s ▁r uling ▁in ▁Mar bury ▁v . ▁Mad ison , ▁ 5 ▁U . S . ▁( 1 ▁C ranch ) ▁ 1 3 7 ▁( 1 8 0 3 ), ▁United ▁States ▁federal ▁courts ▁have ▁the ▁authority ▁to ▁jud icial ly ▁review ▁the ▁stat utes ▁en act ed ▁by ▁Congress , ▁and ▁declare ▁a ▁stat ute ▁invalid ▁if ▁it ▁viol ates ▁the ▁Constitution . ▁But ▁the ▁Constitution ▁sets ▁no ▁express ▁limits ▁on ▁how ▁much ▁federal ▁authority ▁can ▁be ▁deleg ated ▁to ▁a ▁government ▁ag ency . ▁R ather , ▁limits ▁on ▁the ▁authority ▁granted ▁to ▁a ▁federal ▁ag ency ▁occur ▁within ▁the ▁stat utes ▁en act ed ▁by ▁Congress . ▁It ▁is ▁also ▁worth ▁not ing ▁that ▁federal ▁courts ▁are ▁constitution ally ▁of ▁" limited ▁juris diction ". ▁Congress ▁best owed ▁on ▁them ▁the ▁authority ▁to ▁adj ud icate ▁administrative ▁matters ▁in ▁ 1 9 4 8 . ▁[ 2 8 ▁US C ▁sec . ▁ 1 3 3 1 ▁( 1 9 4 8 )] ▁ ▁In ▁ 1 9 7 4 ▁the ▁Supreme ▁Court ▁stated ▁that ▁de ference ▁depends ▁on ▁an ▁administrative ▁interpretation ▁being ▁consistent ▁with ▁the ▁ag ency ' s ▁other ▁statements ▁and ▁being ▁consistent ▁with ▁the ▁con gression al