The position's authority was also the same as in the Kamakura period; at first it covered Taibon-Sankajo (three official authorities given to Shugo), but in order to stabilize domestic rule, in 1346 the new powers of the right to judge criminal cases over Karita-rozeki (to reap rice illegally) and the right to pass a delegate the word were added.
職権についても鎌倉期と同じく、初めは大犯三ヶ条とされていたが、国内統治を一層安定させるため、1346年（貞和2）、刈田狼藉の検断権と使節遵行権が新たに守護の職権に加えられた。