accordance (n.) Look up accordance at Dictionary.com
c. 1300, "compliance;" early 14c., "agreement, concurrence," from Old French acordance "agreeing, reconciliation, harmony," noun of action from acorder (see accord). Of things, "conformity, compatibility, harmony," late 14c. Phrase in accordance with is attested from c. 1810 (in Middle English, in accordance of was the usual form).