(a) Be willing to dispose of as Class I-A milk in the marketing area milk received at the plant or on the unit from dairy farmers and agree that if a plant designation is canceled for failure to meet this requirement, the Class I-A and Class I-B milk of such plant through the partial pool plant provision and partial pool unit provisions shall be priced and equalized from the effective date of cancellation through the following June 30.

(b) Keep such control over the sanitary conditions under which milk received at the plant or on the unit is produced and handled that the milk can meet the requirements of a source of milk for the marketing area; provided, that approval by a health authority of the plant as a source of milk for the marketing area shall constitute sufficient evidence that this requirement is being met even though such approval is restricted to prohibit shipment to the marketing area of milk for specified periods during which permission is given by such health authority for receiving unapproved milk or skim milk at the plant or for shipment of approved skim milk from such plant; and

(c) Have no commitments for disposition of milk that prevent him from utilizing milk as set forth in section 20.27(g) of this Part.