delivered the opinion of the court:
Plaintiffs, James “Pate” Philip, Henry Hyde, and the Village of Bensenville, initiated an action in the circuit court of Du Page County against defendants, the City of Chicago and Richard M. Daley. The complaint sought, inter alia, a declaration that an attempt by defendants to acquire property in anticipation of the expansion of O’Hare International Airport without first obtaining approval from the Illinois Department of Transportation (IDOT) was beyond the authority of the city. Plaintiffs also sought a preliminary injunction prohibiting defendants from proceeding with land acquisition, and the trial court granted this request. Defendants now appeal, and we affirm.
Before proceeding further, we must address two matters. First, defendants have filed what they term an “Emergency Motion for Summary Reversal.” We ordered the motion taken with the case. After the parties completed their briefing of this appeal, the supreme court delivered its decision in People ex rel. Birkett v. City of Chicago,
I. BACKGROUND
On June 11, 2002, Chicago announced a plan seeking to acquire 433 acres adjacent to O’Hare for runway expansion. Chicago stated that it would acquire the property either through voluntary transactions with property owners or through the power of eminent domain. Within the area of Bensenville that Chicago wants to acquire he 533 homes and 55 businesses. The area also contains a police station and a fire station. The housing in this area is affordable for people of low and moderate income. Further, the acquisition would displace over 400 students and possibly cause an elementary school to close.
Chicago did not seek IDOT’s approval before commencing its land-acquisition program. The central issue involved in this appeal is whether section 47 of the Illinois Aeronautics Act (Aeronautics Act) (620 ILCS 5/47 (West 2000)) requires a party seeking to acquire land for airport development to obtain a “certificate of approval” prior to proceeding. Section 47 states, in part, that “[i]t shall be unlawful for any municipality or other political subdivision *** to make any alteration or extension of an existing airport *** for which a certificate of approval has not been issued by [IDOT].” 620 ILCS 5/47 (West 2000). IDOT has promulgated a regulation explaining this language. The regulation provides:
“The phrase, ‘alteration or extension’, shall include any of the following:
a) Any material change in the length, width or direction of runways or landing strips;
b) Construction or installation of any building or other structure on the airport property which would extend above an approach slope or a transition slope or turning zone;
c) Planting or permitting to grow any growth or placement of any other obstacle on the airport property which would extend above an approach slope or a transition slope or turning zone.” 92 Ill. Adm. Code § 14.640 (1998).
This regulation was enacted by IDOT in 1985.
Plaintiffs moved for a preliminary injunction, and a hearing was held on the matter. James Bildilli, the chief engineer of the Bureau of Airport Engineering for IDOT’s Division of Aeronautics, testified, and an affidavit of his was submitted as well. Bildilli addressed IDOT’s interpretation of section 47 of the Aeronautics Act. He explained that IDOT interprets “make any alteration or extension” (620 ILCS 5/47 (West 2000)) to mean “construct and put into service.” He further stated that it has been IDOT’s practice to wait until after the Federal Aviation Administration (FAA) has completed its approval process before taking action. This practice, according to Bildilli, allows IDOT to avoid unnecessary, costly duplication of functions properly performed by the FAA. See 620 ILCS 5/25 (West 2000). Further, Bildilli testified that IDOT does not require certification prior to land acquisition, even where the land is to be used for a runway. He added that if Chicago had sought a certificate prior to land acquisition, IDOT would have considered the application premature.
The trial court granted plaintiffs’ request for a preliminary injunction. The trial court first observed that it is uncontested that Chicago intends at some point “to make” an alteration or extension of O’Hare; therefore, it must seek IDOT approval eventually. The court found that land acquisition is part of the process of “making” a runway. Thus, the court reasoned that, as part of the process of making a runway, certification is required prior to land acquisition. The court also found that deference to IDOT’s interpretation was inappropriate because the term “to make” (620 ILCS 5/47 (West 2000)), read in light of other pertinent portions of the Aeronautics Act, is not ambiguous. Accordingly, the trial court enjoined Chicago from proceeding with land acquisition until it obtained approval from IDOT.
II. ANALYSIS
Defendants assert that the trial court should not have issued a preliminary injunction, arguing that the Aeronautics Act (620 ILCS 5/1 et seq. (West 2000)) does not require them to seek approval from IDOT prior to acquiring land and that, in the alternative, federal law preempts the permit process set forth in the Aeronautics Act (see 620 ILCS 5/47 (West 2000)). We disagree with both contentions. In reviewing the propriety of a preliminary injunction, we normally apply the abuse-of-discretion standard. People ex rel. Klaeren v. Village of Lisle,
A. The Illinois Aeronautics Act
Defendants first contend that the Aeronautics Act does not require them to seek approval from IDOT before beginning its land-acquisition program. Defendants’ reasoning is relatively straightforward. First, they note that both this court and the supreme court have held that section 47 of the Aeronautics Act is ambiguous regarding how significant an alteration or extension of an airport must be before certification is necessary. Birkett,
Defendants’ reliance on IDOT’s interpretation of section 47 is misplaced. When a statute is ambiguous, an interpretation by an agency charged with administering it is generally entitled to significant deference. Illinois Consolidated Telephone Co. v. Illinois Commerce Comm’n,
In construing section 47, we begin with the fundamental maxims that the primary goal of statutory construction is to give effect to the intent of the legislature and that the best indicator of legislative intent is the plain language of the statute itself. Mobil Oil Corp. v. Industrial Comm’n,
“Operation without certificate of approval unlawful; applications. An application for a certificate of approval of an airport or restricted landing area, or the alteration or extension thereof, shall set forth, among other things, the location of all railways, mains, pipes, conduits, wires, cables, poles and other facilities and structures of public service corporations or municipal or quasi-municipal corporations, located within the area proposed to be acquired or restricted, and the names of persons owning the same, to the extent that such information can be reasonably ascertained by the applicant.
It shall be unlawful for any municipality or other political subdivision, or officer or employee thereof, or for any person, to make any alteration or extension of an existing airport or restricted landing area, or to use or operate any airport or restricted landing area, for which a certificate of approval has not been issued by the Department; Provided, [sic] that no certificate of approval shall be required for an airport or restricted landing area which was in existence and approved by the Illinois Aeronautics Commission, whether or not being operated, on or before July 1, 1945.” 620 ILCS 5/47 (West 2000).
The first paragraph quoted above sets forth certain requirements regarding what information must be included in an application for a certificate of approval. The second paragraph declares it unlawful to “make any alteration or extension” of an airport without such a certificate.
Our supreme court construed the phrase “make any alteration or extension” in Birkett,
The court then noted that the legislature provided no guidance for resolving this question in the language of section 47. Birkett,
The instant case does not involve construction; it involves land acquisition. In Birkett, the supreme court noted that the legislature expressed no concern for an airport’s ground transportation or terminal facilities in the Aeronautics Act. Birkett,
“An application for a certificate of approval of an airport *** shall set forth, among other things, the location of all railways, mains, pipes, conduits, wires, cables, poles and other facilities and structures of public service corporations or municipal or quasi-municipal corporations, located within the area proposed to be acquired or restricted, and the names of persons owning the same, to the extent that such information can be reasonably ascertained by the applicant.” (Emphasis added.) 620 ILCS 5/47 (West 2000).
That the statute specifies that an application must include certain information about the “area proposed to be acquired” is a clear indication that the legislature intended the certification process to precede land acquisition. Additionally, the application must include the names of the owners of the property sought to be acquired; therefore, the statute indicates that, regarding land acquisition, the legislature contemplated someone other than the proprietor of the airport owning the land at the time the application for a certificate was filed.
In short, the legislature addressed the subject of land acquisition relative to the certification process, and the plain language with which it spoke on this subject shows that it intended land acquisition to follow certification. Because the legislature has spoken plainly on this issue, Birkett is distinguishable. There is simply no need to consult IDOT’s interpretation of section 47. It is for this reason we also find defendants’ reliance on an opinion letter written by IDOT’s secretary beside the point. Moreover, to the extent that IDOT’s interpretation conflicts with the plain language of the statute, it must be rejected. Cella v. Sanitary District Employees’ & Trustees’ Annuity & Benefit Fund,
Defendants raise two main arguments as to why this conclusion should not follow. First, they point out. that a statute must be interpreted as a whole and that a court must consider the purpose of the statute. Petroline Co. v. Advanced Environmental Contractors, Inc.,
It is true that the Aeronautics Act is primarily concerned with “maintaining a safe, uniform, and coherent system of flight patterns and air traffic.” Birkett,
Defendants also contend that the legislature has acquiesced in IDOT’s interpretation of section 47. In Birkett,
IDOT’s interpretation limits the reach of section 47 regarding issues of airport construction and improvement to projects that affect flight paths or runways. See 92 Ill. Adm. Code § 14.640 (1998). This interpretation does not conflict with the statute insofar as matters of construction and improvement are concerned. However, if this interpretation were to be applied to land acquisition, it would conflict with portions of section 47. A court “will not adopt an agency’s interpretation if it is inconsistent with the language of the statutory provision.” Cella,
In sum, we hold that the plain language of section 47 requires certification prior to land acquisition. Neither the purpose of the statute nor the General Assembly’s acquiescence in IDOT’s construction of the statute requires a different result. Accordingly, we find no error in the trial court’s decision to grant plaintiffs’ request for a preliminary injunction.
B. Preemption
Defendants also contend that federal law preempts state regulation of the expansion of airport facilities. To resolve this issue, it is important to recognize precisely what it is that defendants are arguing. The challenge they make is to the certification process itself. At times, they point out specific substantive requirements of the Aeronautics Act that they find objectionable, such as section 48’s directive that IDOT consider the effect of the proposed development on “the then current State airport plan” (620 ILCS 5/48 (West 2000)). However, these provisions are not ripe for review. IDOT has not sought to curtail the expansion of O’Hare based on such requirements. It has taken no action regarding Chicago’s plan. We will not assume that, being aware of the dictates of federal law, IDOT will take any action that will conflict with federal law. See Gromer Supermarket, Inc. v. Pollution Control Board,
Before continuing, we must address plaintiffs’ contention that this issue is not properly before this court. Plaintiffs argue that defendants failed to raise this issue in the trial court in response to plaintiffs’ motion for a preliminary injunction. However, as defendants point out, they did raise this issue, albeit briefly, in their memorandum opposing plaintiffs’ motion. Accordingly, we will address this issue. We also note that this court recently addressed a similar issue and held that federal law does not preempt section 47. See Birkett,
Plaintiffs argue that the tenth amendment precludes preemption of the certification requirement set forth in section 47. U.S. Const., amend. X. The tenth amendment states, “The powers not delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people.” U.S. Const., amend. X. The Constitution recognizes that both the federal government and the states are sovereigns in their respective realms and that the federal government is one of limited, delegated powers. Gregory v. Ashcroft,
The United States Supreme Court has confronted tenth-amendment issues in two main contexts. First, it has considered whether the tenth amendment precludes the application of a law of general applicability to a state. See, e.g., Garcia v. San Antonio Metropolitan Transit Authority,
To resolve this issue, we must first consider both Chicago’s status as a governmental body and the nature of the power it seeks to exercise. Regarding Chicago’s status, we find the following passage instructive:
“It is universally recognized that municipal corporations are creatures of the State and that, absent constitutional restraints (e.g., voting rights (Gomillion v. Lightfoot (1960),364 U.S. 339 ,5 L. Ed. 2d 110 ,81 S. Ct. 125 ); ‘home rule’ (Ill. Const. 1970, art. VII, § 6)), they are subject to the will and discretion of the legislature. (See, e.g., Hunter v. City of Pittsburgh (1907),207 U.S. 161 , 177-80,52 L. Ed. 151 , 158-60,28 S. Ct. 40 , 46-47; City of Chicago v. M. & M. Hotel Co. (1910),248 Ill. 264 , 268-69.) It is also well settled that the legislature has the power to fix and control the territory and boundaries of municipal corporations. (See, e.g., Richter v. City of Mt. Carroll (1947),398 Ill. 473 , 477; Geweke v. Village of Niles (1938),368 Ill. 463 , 467,117 A.L.R. 262 ; Coles v. County of Madison (1826),1 Ill. 154 , 160.) The legislature has provided various methods for altering municipal boundaries, including provisions for the disconnection of property. See generally Ill. Rev. Stat. 1985, ch. 24, par. 7 — 1—1 et seq., par. 7 — 3—1 et seq.” Harris Trust & Savings Bank v. Village of Barrington Hills,133 Ill. 2d 146 , 153 (1989).
Thus, unless the state or federal constitution requires otherwise, Chicago’s ability to acquire land for the purpose of expanding O’Hare is subject to the “will and discretion” of the General Assembly.
Chicago is a home rule municipality. Endsley v. City of Chicago,
Defendants argue that federal law preempts the certification process itself. At its core, this contention amounts to a claim that the legislature must confer on Chicago the ability to acquire land, by condemnation or otherwise, in a neighboring municipality, so long as it relates to the construction or improvement of an airport. If such a principle were to be given effect, it would strike at the very heart of what it means to be a sovereign entity. See Gregory,
Preemption is, of course, a matter of congressional intent. Pacific Gas & Electric Co. v. State Energy Resources Conservation & Development Comm’n,
Where congressional action could alter the constitutional balance between federal and state power, it should not be lightly assumed that Congress intended such a result. Gregory,
Mandating that a state alter the relationship of authority it has established between its municipalities and agencies would certainly “alter the constitutional balance between state and federal government.” See Highland Farms Dairy, Inc. v. Agnew,
“The present case concerns a state constitutional provision through which the people of Missouri establish a qualification for those who sit as their judges. This provision goes beyond an area traditionally regulated by the States; it is a decision of the most fundamental sort for a sovereign entity. Through the structure of its government, and the character of those who exercise government authority, a State defines itself as a sovereign.” Gregory,501 U.S. at 460 ,115 L. Ed. 2d at 423 ,111 S. Ct. at 2400 .
Furthermore, the court recognized that “[congressional interference with this decision of the people of Missouri, defining their constitutional officers, would upset the usual constitutional balance of federal and state powers.” Gregory,
We are unaware of any such statement appearing in any of the statutes upon which defendants rely in support of their preemption argument. Defendants specifically rely on the Federal Aviation Act of 1958 (49 U.S.C. § 40101 et seq. (1994)), the Noise Control Act of 1972 (49 U.S.C. § 44715 (1994)), and the Airport and Airway Improvement Act of 1982 (49 U.S.C. § 47101 et seq. (1994)). The Seventh Circuit has expressly held that “[n]either the Constitution nor the Federal Aviation Act, as amended by the Noise Control Act of 1972, determines how Illinois apportions its governmental powers.” Bieneman v. City of Chicago,
We further doubt that Congress has the power to preempt the certification process set forth in section 47 (620 ILCS 5/47 (West 2000)). As noted above, Chicago’s ability to acquire land outside its territorial borders is not a home rule power (Harris Bank of Roselle,
Congress cannot, of course, compel a state to legislate. The Supreme Court has never “sanctioned explicitly a federal command *** to promulgate and enforce laws and regulations.” Federal Energy Regulatory Comm’n v. Mississippi,
We recognize that the instant case differs significantly from New York. In New York, Congress had enacted a statute directing states to take certain actions. Here, the statutes upon which defendants rely contain no such provisions; rather, they are laws of general applicability. However, the underlying principles of New York provide some guidance. If we were to apply federal law in the manner advocated by defendants, we would be forced to say that the General Assembly is required to confer more power on Chicago than it has deemed proper. Federal law can no more compel the legislature to do so than it could compel New York to legislate according to federal standards or take title to nuclear waste. We see no significance in the fact that the compulsion would be indirect or unintentional in the present case. Congress cannot do accidentally what it could not do purposely.
Applying federal law in the manner urged by defendants would leave this state with no choice but to confer upon Chicago the authority to acquire land outside of its territorial limits. It is true that Congress can seek to influence state action. For example, it may make the receipt of federal funds contingent upon certain conditions. See South Dakota v. Dole,
To conclude, we hold that federal law does not preempt the certification requirement contained in section 47 (620 ILCS 5/47 (West 2000)). Congress intended no such result, and even if it did, preemption of the internal governmental processes of a state is generally beyond its power. In another case involving O’Hare, the Seventh Circuit provided this apt summarization: “Illinois might choose to exercise such powers as it has through the City Of Chicago, the ‘owner’ of O’Hare. It might withdraw home rule from Chicago and exercise these powers through legislation of general application. Or it might exercise these powers through the courts.” Bieneman,
III. CONCLUSION
In light of the foregoing, we affirm the order of the circuit court of Du Page County granting plaintiffs’ request for a prehminary injunction.
Affirmed.
HUTCHINSON, EJ., and GILLERAN JOHNSON, J., concur.
