33 U.S.C. § 569a : US Code - Section 569A: Temporary employment of experts or consultants; compensation

Search 33 U.S.C. § 569a : US Code - Section 569A: Temporary employment of experts or consultants; compensation

The Chief of Engineers is authorized to procure the temporary or
intermittent services of experts or consultants or organizations
thereof in connection with civil functions of the Corps of
Engineers without regard to chapter 51 and subchapter III of
chapter 53 of title 5: Provided, That individuals so engaged may be
paid at rates not to exceed the daily equivalent of the rate for GS-
18 for each day of their services.