Answer:

danelaw

Answer	Crossword Clue
DANELAW	9th cen. England's rules
DANELAW	Region of old England
DANELAW	Ancient law in England.

DANELAW	Norse code.
DANELAW	Part of English jurisdiction after 886.
DANELAW	Part of England in the time of Alfred the Great
DANELAW	Rules in force in England before the Norman conquest