; (2) the head of a relevant university-based center within the Department’s centers of excellence network; and (3) the heads of other appropriate Federal agencies. (d) Waiver The Secretary, in collaboration with the Secretary of State, is authorized to waive the requirements of subsection (a) as necessary to comply with international obligations of the United States. 439. Open source screening The Secretary shall, to the greatest extent practicable, and in a risk based manner, review open source information of visa applicants. . (b) Clerical amendment The table of contents in section 1(b) of the Homeland Security Act of 2002, as amended by this division is further amended by inserting after the item relating to section 437 the following new items: Sec. 438. Social media screening. Sec. 439. Open source screening. . 3106. Cancellation of additional visas (a) In general Section 222(g) of the Immigration and Nationality Act ( 8 U.S.C. 1202(g) ) is amended— (1) in paragraph (1)— (A) by striking Attorney General and inserting Secretary ; and (B) by inserting and any other nonimmigrant visa issued by the United States that is in the possession of the alien after such visa ; and (2) in paragraph (2)(A), by striking (other than the visa described in paragraph (1)) issued in a consular office located in the country of the alien's nationality and inserting (other than a visa described in paragraph (1)) issued in a consular office located in the country of the alien's nationality or foreign residence . (b) Effective date The amendment made by subsection (a) shall take effect on the date of the enactment of this Act and shall apply to a visa issued before, on, or after such date. 3107. Visa information sharing (a) In general Section 222(f) of the Immigration and Nationality Act ( 8 U.S.C. 1202(f)(2) ) is amended— (1) by striking issuance or refusal and inserting issuance, refusal, or revocation