SALT LAKE CITY — Utah Gov. Gary Herbert has signed legislation repealing state laws that make blacklisting a crime.

West Valley City Republican Sen. Daniel Thatcher authored the repeal legislation, saying the blacklisting law was outdated and unenforceable.

The law was passed in 1969 and made it a felony for anyone to blacklist or conspire against employees to prevent them from working in another job.

During the 1940s and '50s, Hollywood writers and actors accused of having communist leanings were blacklisted and unable to work.

Thatcher says Utah's law was vague enough that companies that ask employees to sign a noncompete clause or give a poor reference to a future employer could be accused of blacklisting employees.