This chapter shall not apply to any individual who provides services as a leased-operator or an owner-operator of a motor vehicle or vehicles under contract to a common carrier doing an interstate business while engaged in interstate commerce regardless of whether the common law relationship of master and servant exists; provided, that this chapter shall apply to those employees of the common carrier who do not provide services as a leased-operator or an owner-operator of a motor vehicle or vehicles under contract to a common carrier doing interstate business while engaged in interstate commerce.