What's implied here is 'is', i.e. "a bad law is no law." The phrase seems to be a rehash of a quote from St Augustine: "lex iniusta non est lex" meaning "an in

What's implied here is 'is', i.e. "a bad law is no law." The phrase seems to be a rehash of a quote from St Augustine: "lex iniusta non est lex" meaning "an injust law is not a law", which is more clear.