(a) If the item is displayed upon a shelf and conspicuously visible to the consumer, by attaching a stamp, tag or label on the shelf edge directly beneath the item offered for sale. If such attachment is impossible, a stamp, tag or label may be placed directly adjacent to or on the consumer commodity to which it relates.

(b) If the item is conspicuously visible to the consumer but is not displayed upon a shelf, such as items offered for sale in aisle displays, baskets, portable racks, or bins, by:

(c) If the item is refrigerated and conspicuously visible to the consumer, but not displayed upon a shelf, by:

(d) If the item is refrigerated, conspicuously visible to the consumer, and displayed upon shelves, the provisions of subdivision (a) of this section shall govern.

(e) If the item is not conspicuously visible to the consumer, by placing a sign or list at the point of procurement and in such a manner that the unit pricing information contained thereon is plainly visible from such point, or by affixing the unit price and total selling price upon the commodity itself.