31 CFR § 13.3 - Eligibility to receive protection or reimbursement.
(a) Protection, as determined by the Assistant Secretary, will be provided by the United States Secret Service Uniformed Division, pursuant to section 202 of Title 3, U.S. Code, as amended by Pub. L. 94-196, only to foreign diplomatic missions located in metropolitan areas (other than the District of Columbia) where there are located twenty or more such missions, as determined by the Secretary of State, which are headed by full time officers. According to present State Department figures, the following metropolitan areas have 20 or more such foreign diplomatic missions: Chicago, Houston, Los Angeles, Miami, New York City, New Orleans and San Francisco. The protection provided by State or local governments rather than the United States Secret Service Uniformed Division will be reimbursed pursuant to section 208(a) of Title 3, U.S. Code and §§ 13.6, 13.7 and 13.8 of this part.
(1) The affected metropolitan area requests such protection or reimbursement;
(3) The extraordinary need arises in association with a visit to or occurs at or, pursuant to § 13.6, in the vicinity of: (i) A permanent mission to an international organization of which the United States is a member, (ii) an observer mission invited to participate in the work of an international organization of which the United States is a member, or (iii) in the case of a visit by a foreign official or dignitary to participate in an activity of an international organization of which the United States is a member, a foreign diplomatic mission, including a consular office of the same country as the visitor.
(d) Where an extraordinary protective need exists, protection (or reimbursement) may be extended to missions as described in §§ 13.3(b)(3) (i) and (ii) whether or not associated with a visit by a foreign dignitary.