UBS Tuesday issued a code of ethics and conduct it will require all of its roughly 69,000 employees to sign, part of the Swiss bank's effort to restore its reputation after a messy U.S. probe into hidden offshore accounts.

The code, prefaced by UBS chairman Kaspar Villiger and Chief Executive Oswald Gruebel, addresses issues such as financial crime, competition, confidentiality and diversity, as well as how UBS expects its private bankers to act when dealing with cross-border business.