Each stabilization and marketing plan may provide for minimum charges for the various services performed or rendered by a nonprofit cooperative association in respect to class 1 market milk sold or delivered to another handler. Handler services include component testing for payment purposes, quality control, producer payroll, weighing and sampling of bulk market milk. Each stablization and marketing plan may also include, but not be limited to, minimum charges for the handling of intermittent or irregular deliveries of market milk and plant standby services. The stabilization and marketing plan may enumerate applicable minimum charges and establish individual charges for each service enumerated or, in the alternative, the director may establish one or more minimum charges covering one or more of the separate handler services.