"Interdependence in their functions," as referenced in RSA 77-A:1, XIV, means that relationship in which the New Hampshire entity is an integral part of a larger system where the business done within the state is dependent upon or contributes to the operation of the business without the state as demonstrated by such factors as:
N.H. Admin. Code § Rev 301.20
#4192, eff 12-23-86; amd by #4438, eff 6-22-88; ss by #5490, eff 10-19-92; ss by #6853, eff 9-23-98; ss by #8709, eff 8-25-06