; or (B) to carry out or assist law enforcement activity in the United States. (3) Exception relating to importation of goods (A) In general The authorities and requirements to impose sanctions authorized under this section shall not include the authority or a requirement to impose sanctions on the importation of goods. (B) Good defined In this paragraph, the term good means any article, natural or manmade substance, material, supply, or manufactured product, including inspection and test equipment, and excluding technical data. (f) Definitions In this section: (1) Admission; admitted; alien The terms admission , admitted , and alien have the meanings given those terms in section 101 of the Immigration and Nationality Act ( 8 U.S.C. 1101 ). (2) Gain-of-function research of concern The term gain-of-function research of concern means, with respect to the study of viruses— (A) the use of genetic engineering or nucleic acid synthesis methods reasonably anticipated to increase a pathogen’s transmissibility, or pathogenicity to humans, or to alter a pathogen’s host tropism to include humans; (B) the use of serial passage methods in a laboratory culture or in laboratory animals reasonably anticipated to increase a pathogen’s transmissibility, or pathogenicity to humans, or to alter a pathogen’s host tropism to include humans