It is no answer to say that “[a]fter all, if a policeman must know the Constitution, then why not a planner?”
San Diego Gas & Electric Co. v.
San Diego, 450 U. S. 621, 661, n. 26 (1981) (Brennan, J., dissenting). To begin with, the Court has repeatedly recognized that it itself cannot establish any objective rules to assess when a regulation becomes a taking. See
Hodel v.
Irving, 481 U. S. 704, 713-714 (1987);
Andrus v. Allard, 444 U. S. 51, 65 (1979);
Penn Central, 438 U. S., at 123-124. How then can it demand that land planners do any better? However confusing some of our criminal procedure cases may be, I do not believe they have been as open-ended and standardless as our regulatory takings cases are. As one commentator concluded: “The chaotic state of taking law makes it especially likely that availability of the damages remedy will induce land-use planning *341officials to stay well back of the invisible line that they dare not cross.” Johnson, Compensation for Invalid Land-Use Regulations, 15 Ga. L. Rev. 559, 594 (1981); see also Sallet, The Problem of Municipal Liability for Zoning and Land-Use Regulation, 31 Cath. U. L. Rev. 465, 478 (1982);
Charles v.
Diamond, 41 N. Y. 2d 318, 331-332, 360 N. E. 2d 1295, 1305 (1977);
Allen v.
City and County of Honolulu, 58 Haw. 432, 439, 571 P. 2d 328, 331 (1977). Another critical distinction between police activity and land-use planning is that not every missed call by a policeman gives rise to civil liability; police officers enjoy individual immunity for actions taken in good faith. See
Harlow v.
Fitzgerald, 457 U. S. 800 (1982);
Davis v.
Scherer, 468 U. S. 183 (1984). Moreover, municipalities are not subject to civil liability for police officers’ routine judgment errors. See
Monell v.
New York City Dept. of Social Services, 436 U. S. 658 (1978). In the land regulation context, however, I am afraid that any decision by a competent regulatory body may establish a “policy or custom” and give rise to liability after today.