The U.S. Chamber of Commerce is urging Congress to tweak the Foreign Corrupt Practices Act, arguing that ambiguity in the anti-bribery law and extreme positions taken by U.S. law enforcement agencies have injured U.S. business.

A paper to be released Wednesday at the chamber's annual Institute for Legal Reform summitproposes five amendments to the 33-year-old statute, which bars companies from paying bribes to foreign officials to secure business advantage.

Among...