The main purpose of this legislation is to extend the ability of the United States Postal Service to issue a special stamp, known as a semipostal stamp, specifically to raise funds for breast cancer research. This initiative aims to continue supporting efforts in combating breast cancer through financial contributions generated by the sale of these stamps. The key provision of this legislation is the extension of the authority for the Postal Service to issue the semipostal stamp until the year 2037. Previously, this authority was set to expire in 2027.