safe conduct
From Longman Dictionary of Contemporary Englishsafe conductˌsafe ˈconduct noun [countable, uncountable] PROTECTsafe passageExamples from the Corpussafe conduct• Apart from the commander of the garrison and his guard who were given safe conduct to Ascalon they spared none.• Rafael was granted safe conduct out of the country.• They would be guaranteed safe conduct north.