BUCKLEY v. VALEO
1
Per Curiam
may deter those who seek to exercise protected First
Amendment rights.
Section 434 (e) applies to "[e]very person . . .who
makes contributions or expenditures." "Contributions"
and "expenditures" are defined in parallel provisions in
terms of the use of money or other valuable assets "for
the purpose of ...influencing" the nomination or election
of candidates for federal office.10 ° It is the ambiguity
of this phrase that poses constitutional problems.
Due process requires that a criminal statute provide
adequate notice to a person of ordinary intelligence that
his contemplated conduct is illegal, for "no man shall be
held criminally responsible for conduct which he could
United
not reasonably understand to be proscribed."
States v. Harriss, 347 U. S. 612, 617 (1954). See also
Papachristouv. City of Jacksonville, 405 U. S.156 (1972).
Where First Amendment rights are involved, an even
"greater degree of specificity" is required. Smith v.
Goguen, 415 U. S., at 573. See Grayned v. City of Rockford, 408 U. S.104, 109 (1972); Kunz v. New York, 340
U. S. 290 (1951).
There is no legislative history to guide us in determining the scope of the critical phrase "for the purpose of...
influencing." It appears to have been adopted without
comment from earlier disclosure Acts.10 ' Congress "has
voiced its wishes in [most] muted strains," leaving us to
draw upon "those common-sense assumptions that must
be made in determining direction without a compass."
Rosado v. Wyman, 397 U. S. 397, 412 (1970). Where
the constitutional requirement of definiteness is at stake,
we have the further obligation to construe the statute,
the provisions of this subchapter shall be fined not more than $1,000
or imprisoned not more than one year, or both."
100 §§ 431 (e), (f).
See Appendix to this opinion, infra, at 145-149.
101 See supra, at 61-63.
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