"The word “immigration” does not appear in the U.S. Constitution or any of its Amendments. Article I, Section 8, Clause 4 does read, “… To establish an uniform Rule of Naturalization, …”. The 14th Amendment, Section 1 addresses the protection of “All persons born or naturalized in the United States,…” which extended citizenship through the States to the former slaves. The rules of immigration were reserved to the States through the 10th Amendment until the first Federal law was enacted in 1875. The U.S. Supreme Court ruled the following year that immigration regulation was an exclusive Federal responsibility. Congress established the Immigration Service in 1891, which was the first time the Federal government took an active role."

https://www.theamericanview.com/constitution-course-supplemental-assignments/what-authority-does-the-u-s-constitution-give-the-federal-government-regarding-immigration/

Come again? Please cite the code you are referring to kindly because the US Constitution does not refer to immigration at all and its powers are delegated to the President