MEMORANDUM FINDINGS OF FACT AND OPINION
WHERRY, Judge: This case is before the Court on a petition for redetermination of deficiencies for petitioners' 2002 and 2003 tax years. The issue for decision is whether petitioners are entitled to exclude under section 9111 all wage income Mrs. Rogers earned in 2002 and 2003 while working for United Airlines, Inc. (United), as a flight attendant.
FINDINGS OF FACT
During 2002 and 2003 petitioners, who are husband and wife, were U.S. citizens residing in Taiwan. Mrs. Rogers was employed by United as a flight attendant based at Hong Kong International Airport. United required Mrs. Rogers to perform preboarding and postarrival services on every flight on which she worked. Mrs. Rogers was required to check in 1 hour and 45 minutes before the departure of a flight. And she was required to perform approximately 30 minutes of postarrival services. United paid Mrs. Rogers for her actual flight time -- from when an airplane pushed back from the terminal until it reached its destination. United did not pay Mrs. Rogers extra amounts for preboarding and postarrival services.
During 2002 Mrs. Rogers worked on 6 round-trip flights from Hong Kong to San Francisco and 17 round-trip flights from Hong Kong to Chicago. 2 During 2003 she worked on the following flights: (1) 8 round-trip flights from Hong Kong to San Francisco; (2) 12 round-trip flights from Hong Kong to Chicago; (3) 6 flights from Hong Kong to Tokyo to San Francisco and then back to Hong Kong via Tokyo; (4) 1 flight from Hong Kong to Tokyo to Chicago and then back to Hong Kong via Tokyo; and (5) 3 flights from Hong Kong to Incheon (Seoul) to Tokyo to Beijing to Tokyo to Seoul to Hong Kong. 3
United paid Mrs. Rogers $ 52,296.51 in wages in 2002 and $ 60,651.89 in wages in 2003. To enable its employees to determine the percentage of wages earned for services rendered in or above a foreign country, United generated and made available on its Web site duty time apportionment forms (DTAs). 4 Petitioners filed Forms 1040, U.S. Individual Income Tax Return, for 2002 and 2003 claiming that all of Mrs. Rogers's wage income was foreign earned income which petitioners could exclude from total income for Federal income tax purposes. 5
On November 28, 2006, respondent issued petitioners a notice of deficiency for their 2002 and 2003 tax years in which respondent determined respective deficiencies of $ 5,434 and $ 8,376. 6 The deficiencies resulted from the disallowance of $ 20,221 of the claimed exclusion for 2002 and $ 29,916 of the claimed exclusion for 2003. Respondent's tax compliance officer (TCO), Vivian Kong, computed the deficiency as follows. Using the DTA petitioners prepared, which covered only the round-trip flights from Hong Kong to San Francisco and from Hong Kong to Chicago, TCO Kong calculated the respective percentages of time Mrs. Rogers spent performing in-flight services over foreign territories, U.S. territories, and international waters for each trip. 7 For routes not covered by petitioners' DTA, TCO Kong calculated the necessary percentages using United's DTAs, which were generally less favorable to petitioners. Then, TCO Kong multiplied those percentages by the total amount of Mrs. Rogers's wage income from United for each of the tax years at issue.
Petitioners filed a timely petition with this Court. At the time they filed their petition, petitioners resided in Taiwan. A trial was held on March 18, 2008, in San Francisco, California.
OPINION
I. Income Earned in International Airspace8
A. Burden of ProofThe Commissioner's determination of a taxpayer's liability for an income tax deficiency is generally presumed correct, and the taxpayer bears the burden of proving that the determination is improper. Rule 142(a); Welch v. Helvering, 290 U.S. 111, 115, 54 S. Ct. 8, 78 L. Ed. 212, 1933-2 C.B. 112 (1933). 9
B. Determination of Taxable IncomeSection 61(a) specifies that "Except as otherwise provided", gross income includes "all income from whatever source derived". Although most countries employ territorial tax systems, the United States employs a worldwide tax system -- it taxes its citizens on their income regardless of its geographic source. See Crow v. Commissioner, 85 T.C. 376, 380 (1985) ("The United States was historically, and continues to be, virtually unique in taxing its citizens, wherever resident, on their worldwide income, solely by reason of their citizenship."); see also Specking v. Commissioner, 117 T.C. 95, 101-102 (2001), affd. sub nom. Haessly v. Commissioner, 68 Fed. Appx. 44 (9th Cir. 2003), affd. sub nom. Umbach v. Commissioner, 357 F.3d 1108, 83 Fed. Appx. 274 (10th Cir. 2003). However, as is often the case with our tax laws, there are exceptions. Section 911, which applies to Mrs. Rogers, is an exception to the U.S. worldwide tax system.
Section 911(a) allows a "qualified individual" to exclude from gross income "foreign earned income". 10 A "qualified individual" is a U.S. citizen whose tax home is in a foreign country if that individual is a bona fide resident of a foreign country for an uninterrupted period that includes an entire taxable year. 11Sec. 911(d)(1). The statute defines "foreign earned income" as "the amount received by such individual from sources within a foreign country or countries which constitute earned income attributable to services performed by such individual". Sec. 911(b)(1)(A).
In 2002 and 2003 Mrs. Rogers was a qualified individual who received foreign earned income with respect to which she is entitled to an exclusion. The question that we are called upon to decide is a matter of degree: How much of Mrs. Rogers's United wages qualifies as "foreign earned income"? The answer turns on how much of Mrs. Rogers's income was earned while she worked in a foreign country.
Section 911 does not define "foreign country". However, one of its implementing regulations, section 1.911-2(h), Income Tax Regs., does:(h) Foreign country. The term "foreign country" when used in a geographical sense includes any territory under the sovereignty of a government other than that of the United States. It includes the territorial waters of the foreign country (determined in accordance with the laws of the United States), the air space over the foreign country, and the seabed and subsoil of those submarine areas which are adjacent to the territorial waters of the foreign country and over which the foreign country has exclusive rights, in accordance with international law, with respect to the exploration and exploitation of natural resources. 12
In Clark v. Commissioner, T.C. Memo 2008-71, we held that international waters are not a "foreign country" and that income earned while traveling in international waters is not "foreign earned income" excludable from gross income under section 911. We can divine no difference between international waters and the airspace above them for purposes of determining whether income earned therein is considered foreign source income. International airspace -- like international waters -- is not under the sovereignty of a Government other than the United States. 13 See Gantchar v. United Airlines, Inc., No. 93 C 1457, 1995 U.S. Dist. LEXIS 3910 (N.D. Ill. Mar. 24, 1995) ("Being outside the United States is not synonymous with being in a foreign state; international airspace and international waters are outside the United States without being inside a foreign state."); see also United States v. Cabaccang, 332 F.3d 622, 626 (9th Cir. 2003) ("Unlike, for example, a foreign nation -- which is unquestionably a 'place outside' the United States -- international airspace is neither a point of origin nor a destination of a drug shipment; it is merely something through which an aircraft must pass on its way from one location to another."). It follows that international airspace is not a "foreign country" for purposes of section 911. As a result, income Mrs. Rogers earned while working in international airspace is not "foreign earned income" and must be included in petitioners' gross income for 2002 and 2003. 14
Respondent has been more than fair in affording petitioners the benefits of their self-prepared DTA, which is at odds with those prepared by United and which may inflate the amount of time Mrs. Rogers spent over foreign countries. Because all flights in 2002 were round-trip flights from Hong Kong to San Francisco or from Hong Kong to Chicago, we find respondent's adjustments for 2002 to be correct except for a $ 1 rounding error in respondent's favor on the round-trip flights from Hong Kong to Chicago. We will allow petitioners to exclude $ 32,077 from their 2002 gross income (rather than the $ 32,076 respondent allowed). Respondent resorted to United's sample DTAs only for 2003 flights on routes not covered by petitioners' DTA.
On brief respondent asserts that it would be administratively burdensome for the Internal Revenue Service to "calculate the respective percentage of wages earned over foreign countries for each flight separately". Nevertheless, on reply brief respondent concedes that nothing prevents an "individual from * * * relying on specific flight plans."
At trial Captain Patrick Palazzolo, a United pilot who flies mainly between Hong Kong and San Francisco, testified credibly that the amount of flight time spent over foreign countries varies depending on weather patterns and the location of the jetstream. For example, a greater portion of a Hong Kong to San Francisco flight is more likely to be over land in the winter than it is in the summer. Thus, if petitioners could prove that Mrs. Rogers flew that route only in the winter, they would be entitled to a higher ratio of time spent over foreign countries for those flights. They have not done so.
For the 2003 routes not covered by their self-prepared DTA, petitioners have not provided evidence that would enable a calculation of actual flight time ratios sufficient to overcome respondent's use of United's DTAs. Without evidence of when she flew (such as flight plans), even with Captain Palazzolo's testimony, we cannot assign flight time ratios in excess of those taken from United's DTAs for the routes on which Mrs. Rogers flew. 15
During 2003 in addition to the round-trip flights from Hong Kong to San Francisco and from Hong Kong to Chicago, Mrs. Rogers flew on (1) six flights from Hong Kong to Tokyo to San Francisco and then back to Hong Kong via Tokyo; (2) one flight from Hong Kong to Tokyo to Chicago and then back to Hong Kong via Tokyo; and (3) three flights from Hong Kong to Seoul to Tokyo to Beijing to Tokyo to Seoul to Hong Kong. Captain Palazzolo did not testify specifically regarding the six flights from Hong Kong to Tokyo to San Francisco and then back to Hong Kong via Tokyo or the flight from Hong Kong to Tokyo to Chicago and then back to Hong Kong via Tokyo.
He did testify regarding the three flights from Hong Kong to Seoul to Tokyo to Beijing to Tokyo to Seoul to Hong Kong. 16 He indicated that the jetstream and winds played little part in these trips and that the flight time would have been "essentially the same in both directions." He testified that a flight from Hong Kong to Tokyo takes about 3 to 3-1/2 hours and that the time spent over foreign territory would be 90 to 95 minutes. He also testified that a flight from Tokyo to Seoul would be almost all over foreign territory (except for a few minutes over the Sea of Japan) and that a flight from Seoul to Beijing would be mostly over foreign territory (except for a few minutes over the Yellow Sea). Respondent has determined that 74.77 percent of Mrs. Rogers's work on the three flights from Hong Kong to Seoul to Tokyo to Beijing to Tokyo to Seoul to Hong Kong is allocable to services rendered over foreign territory. Although we are unable to reconcile respondent's calculation and United's sample DTAs, the amounts are very close and are not materially inconsistent with Captain Palazzolo's testimony. 17
Given respondent's adoption of petitioners' DTAs with respect to the round-trip flights from Hong Kong to San Francisco and from Hong Kong to Chicago, it is possible that petitioners are entitled to a larger foreign territory exclusion with respect to the six flights from Hong Kong to Tokyo to San Francisco and then back to Hong Kong via Tokyo and the one flight from Hong Kong to Tokyo to Chicago and then back to Hong Kong via Tokyo. However, the evidence of record is not sufficient or detailed enough to permit such a finding. Critically missing is information regarding the time spent over international waters during the flights from either San Francisco or Chicago to Tokyo. Those flights, unlike the direct U.S. to Hong Kong flights, are unlikely to cross any Chinese territory and may cross less or no Russian territory given Tokyo's location considerably east-northeast of Hong Kong. This may be especially true during winter months, when more of the flights are over land. Therefore, we shall sustain respondent's calculations of the percentages of those flights spent over foreign territory after correcting certain mathematical errors. 18
Finally, we agree with respondent that petitioners are required to include required preflight and postflight service time when calculating foreign earned income 19 and to allocate income from sick and vacation leave between foreign earned income and income that does not qualify for the section 911 exclusion-in other words, income subject to Federal income tax.
II. Interest AbatementWhen there has been an unreasonable error or delay with respect to a managerial or ministerial act, the Secretary has discretion to abate interest. Sec. 6404(e). We have jurisdiction under section 6404(h) to determine whether the Secretary's decision not to abate interest was an abuse of discretion.
Petitioners argue that they should not be held liable for any interest on their Federal income tax underpayments because the Internal Revenue Service "changed its interpretation of the law in 2002 but failed to provide clear guidance as [to] the exact methodology that must be used in the allocation of wages for flight crews". Respondent counters that we lack jurisdiction over petitioners' interest abatement request because respondent has not made a final determination not to abate interest.
In January 2008 petitioners filed a Form 843, Claim for Refund and Request for Abatement, despite the fact that respondent had advised them to wait until interest had been assessed or their abatement request would be rejected as premature. We lack jurisdiction to consider petitioners' interest abatement request for the same reason that respondent advised them not to file such a request -- abatement of interest is premature because interest has not been assessed and because respondent has not made a final determination not to abate interest. See Muir v. Commissioner, T.C. Memo. 2000-304 ("Consideration of petitioner's request for abatement of interest is premature, however, as there has been neither an assessment of interest nor a final determination by respondent not to abate the interest."), affd. 11 Fed. Appx. 701 (8th Cir. 2001).
The Court has considered all of petitioners' contentions, arguments, requests, and statements. To the extent not discussed herein, we conclude that they are meritless, moot, or irrelevant.
To reflect the foregoing,
Decision will be entered under Rule 155.