Subchapter IV. Inspection and Admission of Aliens 8 U.S. Code §1751. Study of the feasibility of a North American National Security Program 8 U.S. Code §1752. Staffing levels at ports of entry 8 U.S. Code §1752a. Model ports-of-entry 8 U.S. Code §1753. Joint United States-Canada projects for alternative inspections services