488 U.S. 361 (1989) Supreme Court:
We also have recognized, however, that the separation-of-powers principle, and the nondelegation doctrine in particular, do not prevent Congress from obtaining the assistance of its coordinate Branches. In a passage now enshrined in our jurisprudence, Chief Justice Taft, writing for the Court, explained our approach to such cooperative ventures: "In determining what [Congress] may do in seeking assistance from another branch, the extent and character of that assistance must be fixed according to common sense and the inherent necessities of the government co-ordination." J. W. Hampton, Jr., & Co. v. United States, 276 U. S. 394, 406 (1928). So long as Congress "shall lay down by legislative act an intelligible principle to which the person or body authorized to [exercise the delegated authority] is directed to conform, such legislative action is not a forbidden delegation of legislative power." Id., at 409.
Applying this "intelligible principle" test to congressional delegations, our jurisprudence has been driven by a practical understanding that in our increasingly complex society, replete with ever changing and more technical problems, Congress simply cannot do its job absent an ability to delegate power under broad general directives. See Opp Cotton Mills, Inc. v. Administrator, Wage and Hour Div. of Dept. of Labor, 312 U. S. 126, 145 (1941) ("In an increasingly complex society Congress obviously could not perform its functions if it were obliged to find all the facts subsidiary to the basic conclusions which support the defined legislative policy"); see also United States v. Robel, 389 U. S. 258, 274 (1967) (opinion concurring in result). "The Constitution has never been regarded as denying to the Congress the necessary resources of flexibility and practicality, which will enable it to perform its function." Panama Refining Co. v. Ryan, 293 U. S. 388, 421 (1935). Accordingly, this Court has deemed it "constitutionally sufficient if Congress clearly 373*373 delineates the general policy, the public agency which is to apply it, and the boundaries of this delegated authority." American Power & Light Co. v. SEC, 329 U. S. 90, 105 (1946).
