The law seems clear enough....
(a)
Purchase of tissue
It shall be unlawful for any person to knowingly acquire, receive, or otherwise transfer any human fetal tissue for valuable consideration if the transfer affects interstate commerce.
(b)
Solicitation or acceptance of tissue as directed donation for use in transplantation
It shall be unlawful for any person to solicit or knowingly acquire, receive, or accept a donation of human fetal tissue for the purpose of transplantation of such tissue into another person if the donation affects interstate commerce, the tissue will be or is obtained pursuant to an induced abortion, and—
(1) the donation will be or is made pursuant to a promise to the donating individual that the donated tissue will be transplanted into a recipient specified by such individual;
(2) the donated tissue will be transplanted into a relative of the donating individual; or
(3) the person who solicits or knowingly acquires, receives, or accepts the donation has provided valuable consideration for the costs associated with such abortion.
(c)
Solicitation or acceptance of tissue from fetuses gestated for research purposes
It shall be unlawful for any person or entity involved or engaged in interstate commerce to—
(1) solicit or knowingly acquire, receive, or accept a donation of human fetal tissue knowing that a human pregnancy was deliberately initiated to provide such tissue; or
(2) knowingly acquire, receive, or accept tissue or cells obtained from a human embryo or fetus that was gestated in the uterus of a nonhuman animal.
42 U.S. Code 289g 2 - Prohibitions regarding human fetal tissue US Law LII Legal Information Institute