Breast Cancer Research Semi-postal Stamps are subject to special limitations and conditions:
a. Breast Cancer Research Semi-postal Stamps provide a means for customers to make contributions toward breast cancer research. Breast Cancer Research Semi-postal Stamps are offered for sale for a limited time as provided under 39 U.S.C. 414.
b. The price of the Breast Cancer Research Semi-postal Stamp is 40 cents. The postage value of the Breast Cancer Research Semi-postal Stamp is the First-Class Mail Non automation Single-Piece first-ounce letter rate in R100.1.2 that is in effect at the time of purchase. The difference between the purchase price and the First-Class Mail Non automation Single-Piece first-ounce letter rate in effect at the time of purchase constitutes a contribution to breast cancer research, and cannot be used to pay postage. Additional postage must be affixed to pieces weighing in excess of one ounce, pieces subject to the nonstandard surcharge, or pieces for which special services have been elected. The postage value of Breast Cancer Research Semi-postal Stamps is fixed according to the First-Class Mail Non automation Single-Piece first-ounce letter rate in effect at the time of purchase; the postage value of Breast Cancer Research Semi-postal Stamps purchased before any subsequent change in the First-Class Mail Non automation Single-Piece first-ounce letter rate is unaffected by any subsequent change in that rate.
c. Contributions to breast cancer research made through purchase of Breast Cancer Research stamps are not refundable. The postage value of Breast Cancer Research stamps for purposes of exchange or conversion under P014 is determined by the First-Class Mail Non automation Single-
Piece rate in effect at the time of purchase