of Columbia for homeland defense activities. . 4. Conforming amendments to title 10 , United States Code (a) Failure To satisfactorily perform prescribed training Section 10148(b) of title 10, United States Code, is amended by striking the commanding general of the District of Columbia National Guard and inserting the Mayor of the District of Columbia . (b) Appointment of chief of National Guard bureau Section 10502(a)(1) of such title is amended by striking the commanding general of the District of Columbia National Guard and inserting the Mayor of the District of Columbia . (c) Vice chief of National Guard bureau Section 10505(a)(1)(A) of such title is amended by striking the commanding general of the District of Columbia National Guard and inserting the Mayor of the District of Columbia . (d) Other senior National Guard bureau officers Section 10506(a)(1) of such title is amended by striking the commanding general of the District of Columbia National Guard both places it appears and inserting the Mayor of the District of Columbia . (e) Consent for active duty or relocation (1) Section 12301 of such title is amended— (A) in subsection (b), by striking commanding general of the District of Columbia National Guard in the second sentence and inserting Mayor of the District of Columbia