That's precisely the unwritten policy every gay player has adhered to in the history of the NFL.
Hamas says this was a provocation; it started firing rockets en masse, ending the unwritten cease-fire in effect since June.
Expertise at poker used to be an unwritten job requirement for all would-be U.S. presidents.
This is an unwritten yet very real rule that all competent officials understand.
Every important perspective on this issue is opposed to justice being hobbled by “unwritten laws” of prejudicial entitlement.
All our laws, written and unwritten, value private property above human life.
Can you then assert (asked Socrates) of these unwritten laws that men made them?
Mund halten (keep your mouth shut) is the unwritten rule, and every one seems to observe it strictly.
The Silvio Pellicos of Pentonville are yet unwritten martyrs.
He represents the written law, the assembly the unwritten custom or tradition.