In this subchapter, the following definitions apply:
((1)) ** .—** The terms “carrier” and “broker” include a receiver or trustee of a carrier and broker, respectively.
((2)) ** .—** The term “association” means an organization maintained by or in the interest of a group of carriers or brokers providing transportation or service subject to jurisdiction under chapter 135 that performs a service, or engages in activities, related to transportation under this part.