H. Rept. 116-189: Counter Terrorist Network Act, Report to Accompany H.R. 3526, Including Cost Estimate of the Congressional Budget Office, August 27, 2019 [open pdf - 334KB]
From the Document: "U.S. Customs and Border Protection (CBP) is charged with the important mission of securing the Nation's borders and ports of entry against a range of threats including those posed by transnational criminal organizations, smugglers and human traffickers, and terrorist networks. The purpose of this bill is to authorize certain CBP efforts to prevent terrorists and other nefarious actors from exploiting legitimate avenues of traveling to and entering the United States. [...] CBP is uniquely situated to combat threats emanating far from our shores due to its border security mission. One way CBP seeks to combat such threats is to detail personnel for CBP's National Targeting Center (NTC) to other U.S. agencies both domestically and internationally to support efforts to disrupt and dismantle foreign terrorist organizations. The 'Counter Network Act' authorizes such efforts to bolster national and homeland security."
H. Rept. 116-189; House Report 116-189
U.S. Government Publishing Office: http://www.gpo.gov/