; and (2) $2,000,000 is authorized for use to acquire hydrographic data and provide hydrographic services in the Arctic necessary to delineate the United States extended Continental Shelf. . (b) Limitation on administrative expenses for surveys Section 306 of such Act ( 33 U.S.C. 892d ) is further amended by adding at the end the following: (c) Limitation on administrative expenses for surveys Of amounts authorized by this section for each fiscal year for hydrographic surveys, not more than 5 percent is authorized for administrative costs. . 3. GAO study The Comptroller General of the United States shall, by not later than 18 months after the date of enactment of this Act— (1) conduct a study comparing the unit costs of hydrographic surveys conducted by the National Oceanic and Atmospheric Administration and the unit costs of procuring performance of such surveys; and (2) report to the Congress on the findings of such study.