The Modesto Manifesto or Billy Graham rule is a code of conduct among male evangelical Protestant leaders, in which they avoid spending time alone with women to whom they are not married. It is adopted as a display of integrity, a means of avoiding sexual temptation, to avoid any appearance of doing something considered morally objectionable, as well as for avoiding accusations of sexual harassment or assault.
In 2017, it began to be also called the Mike Pence rule, after the US vice president, a practicing Christian, who also supported the idea.
