An association may do all of the following:
(a) Obtain a dispatching service from which registered unloaders may be sent to the places where their services are required.
(b) Act as the bargaining agent to establish with a union the scale of charges for unloading any farm product in the market in accordance with this chapter.
(c) Provide for watchman service to protect and give a receipt for any farm product which is delivered to a market at times when the market is not otherwise in operation.