Rule 405. A person engaged in any other business or enterprise who transports property by motor vehicle for business purposes, unless the transportation is within the scope, and in the furtherance, of the person's primary business enterprise, which is not transportation, is deemed to be conducting a motor-carrier-for-hire operation in evasion of the act, unless the transportation has been authorized by the department pursuant to the act and these rules or is exempt under the act.
Mich. Admin. Code R. 460.18405