An obligation of a volunteer fire department shall not be treated as an obligation of a political subdivision of a State for purposes of section 103(a)(1) unless both conditions set forth in this paragraph (a) are satisfied. Thus, for example, if an obligation is issued by an ambulance and rescue squad that is a qualified volunteer fire department as required by paragraph (a)(1) of this section, but substantially all of the proceeds of the issue of which the obligation is a part are to be used for the furnishing of emergency medical services, rather than for the purposes specified in paragraph (a)(2) of this section, the obligation shall not be treated as an obligation of a political subdivision of a State for purposes of section 103(a)(1).
The requirement of paragraph (b)(2) of this section that a qualified volunteer fire department be required to furnish firefighting services by written agreement with the political subdivision may be satisfied by an ordinance or statute of the political subdivision that establishes, regulates, or funds the volunteer fire department. A volunteer fire department does not fail to satisfy the requirement of pargraph (b)(3) of this section by furnishing or receiving firefighting services on an emergency basis, or by cooperative agreement with other fire departments, to or from areas outside of the area that the volunteer fire department is organized and operated to serve. The fact that tax revenues of a political subdivision served by a volunteer fire department contribute toward the support of the volunteer fire department in the form of salary, purchase of equipment, or other defrayment of expenses will not prevent the volunteer fire department from being a "qualified volunteer fire department" within the meaning of this paragraph (b). Moreover, an obligation of a volunteer fire department receiving such support may qualify as an obligation of a political subdivision within the meaning of section 103(a)(1) independently of section 103(i) and this section if the requirements of section 103(a)(1) are satisfied. See § 1.103-1(b) for rules relating to qualification under section 103(a)(1).
26 C.F.R. §1.103-16