No person shall handle any lot of po-tatoes unless such potatoes meet the requirements of paragraphs (a), (b), (c), and (g) of this section or unless such potatoes are handled in accordance with paragraphs (d) and (e), or (f) of this section, except that shipments of the blue or purple flesh varieties of po-tatoes shall be exempt from both this handling regulation and the assess-ment requirements specified in § 946.41: Provided, That russet type potatoes shall be exempt from the requirements of paragraphs (a), (b), (c), (e), and (g) of this section: Provided further, That, from October 24, 2013, through June 30, 2014, yellow fleshed and white types of potatoes shall be exempt from the re-quirements of paragraphs (a), (b), (c), (e), and (g) of this section.