Big Sky Paramedics, LLC (Big Sky) sought a permanent injunction to enjoin Sagle Fire District (Sagle) from operating an ambulance service. The district court denied the request. Big Sky asks the Supreme Court to reverse the district court’s decision and remand the matter back to the district court for further proceedings consistent with the issuance of a permanent injunction.
I.
FACTUAL AND PROCEDURAL BACKGROUND
Sagle Fire District has operated an ambulance service within its district at the Basic Life Support level since 1997. In February 2000 Sagle upgraded to Intermediate Life Support level and in August 2000 applied for Advanced Life Support level. According to the district court, it is the application for the Advanced Life Support level that apparently caused Big Sky to initiate this lawsuit.
Sagle is a governmental subdivision of the State of Idaho. Unless other services are unavailable (or in response to a mutual aid request), Sagle dispatches ambulances only to incidents of emergencies within the boundaries of the district. Prior to Sagle establishing ambulance service, a private company dispatched from Sagle’s facilities. Sagle became licensed only after that company stopped doing business and Sagle’s board determined that adequate ambulance service was not available to its residents.
Big Sky filed its complaint on December 5, 2001, seeking declaratory judgment and injunctive relief against Sagle. Sagle answered, and a hearing was held in which evidence was presented on the issue of a preliminary injunction. The district court denied Big Sky a preliminary injunction on the basis that preliminary harm had not been shown. Following trial, the district court *436held that Sagle may operate an ambulance service within the jurisdictional boundaries of the fire district and wherever else Sagle has mutual protection agreements. The district court held that whichever agency loads the injured person into its ambulance will transport the injured person, and that if Sagle stabilizes an injured person, but has not loaded that person into Sagle’s ambulance before the arrival of Big Sky, that Big Sky shall be the entity to transport the person. The district court denied Big Sky’s motion for reconsideration. Big Sky appeals.
II.
SAGLE FIRE DISTRICT MAY OPERATE THE AMUBLANCE SERVICE
A. Standard of Review
The principal issue on appeal is whether a fire district created pursuant to Idaho Code has the power and authority to operate an ambulance service. The standard of review of the lower court’s determination on issues of statutory interpretation is one of free review. State v. Nelson, 119 Idaho 444, 446, 807 P.2d 1282, 1284 (Ct.App.1991).
B. Purpose and Power of Fire Districts under I.C. § 31-1401
I.C. § 31-1401 provides the following:
The protection of property against fire and the preservation of life, are hereby declared to be a public benefit, use and purpose. Any portion of a county not included in any other fire protection district may be organized into a fire protection district under the provisions of this chapter. All taxable property within any fire protection district created under the provisions of this chapter is and shall be benefited ratably in proportion to assessed valuation by the creation and maintenance of such district, and all taxable property within any such district shall be assessed equally in proportion to its assessed valuation for the purpose of and in accordance with the provisions of this chapter. This chapter shall be known as the “Fire Protection District Law,” and whenever cited, enumerated, referred to or amended, may be designated as the “Fire Protection District Law,” adding when necessary the code section number.
I.C. § 31-1401 grants fire districts power for “The protection of property against fire and the preservation of life ...” Beyond this, no express powers are given.
Big Sky argues that Sagle does not have the right to operate an ambulance service. Sagle responds that the authority to operate ambulance service may be implied under the language of the statute. According to Big Sky “the preservation of life” provision in the statute encompasses the preservation of life from fire but does not extend to a general grant of power. Sagle asserts that implicit in this language is the right to operate the ambulance service to preserve life beyond the hazards created by fire. The district court made the following determination:
This Court agrees with Sagle’s argument, that since these statutes set forth no specific operational powers at all, not even the specific power to fight a fire, the legislature must have meant them to have broad powers in determining what operations the fire protective district will use the effect “preservation of life.”
Municipal power is a classic example of derivative power. Because a fire district is a governmental subdivision like a city, a fire district possesses only the powers conferred on it by the legislature or which can be derived by necessary implication. State v. Frederic, 28 Idaho 709, 715, 155 P. 977, 983 (1916). This Court has articulated this rule as a strict limitation when construing municipal powers: “municipalities may exercise only those powers granted to them or necessarily implied from the powers granted ... [and i]f there is a fair, reasonable, substantial doubt as to the existence of a power, the doubt must be resolved against the city.” City of Grangeville, 116 Idaho 535, 538, 777 P.2d 1208, 1211.
C.Necessarily Implied Powers
The question is whether the authority to operate an ambulance service is implied in I.C. § 31-1401. The statute does state that a fire district has the power to conduct activi*437ties relating to the “preservation of life.” Regarding municipalities, “if the authority ... is not express but derives from necessary implication, it is not enough that the implied power is ‘convenient’ to [express powers], but it must be indispensable to them.” MCQUILLIN, MUNICIPAL CORPORATIONS § 34.23 (3d. ed.1995). Although Sagle is not a municipality, this approach is applicable. Thus, resolution of the issue turns on how indispensable the operation of an ambulance service is to a fire district.
The district court found that Sagle has operated an ambulance service within its district at the Basic Life Support level since 1997. Sagle upgraded to Intermediate Life Support level in February 2000. Subsequently, Sagle applied for Advanced Life Support Level and received that approval from the State of Idaho Department of Health and Welfare on December 17, 2001. The district court further found:
There is uncontradicted evidence, that especially as to calls originating from south of the Sagle fire station, Big Sky will almost always take longer to respond. This is because Big Sky responds from Sand-point (unless a unit is out on the road roaming around when a call comes in) and Sagle responds from Sagle (unless its unit is out on the road when a call comes in). Whether Sagle can respond two minutes faster on average or five minutes faster on average is of no real significance to the Court. What is significant is that Sagle can respond faster. These are matters of life and death, matter of life protection and life preservation. The uncontradicted evidence is that Sagle is faster to these areas, and if they are faster, they are providing a service that is not “reasonably” available under Idaho Code § 31-3901.
The district court found it uncontradicted that Sagle provides faster ambulance service than Big Sky to the residents of the district. Sagle maintains that it began ambulance service not to compete with private services, but rather to protect the lives of patrons within the district. The Court is satisfied that the “preservation of life” provision in I.C. § 31-1401 extends beyond the preservation of life from fire. The right to operate the ambulance service for the preservation of lives of its residents is encompassed within the Fire District’s power set forth in I.C. 31-1401.
III.
CONCLUSION
The decision of the district court is affirmed. Sagle is awarded costs.
Justice KIDWELL concurs.