Unspoken rule

Rules that are not written down

Unwritten rules are behavioral constraints imposed in organizations or societies that are not typically voiced or written down. They usually exist in unspoken and unwritten format because they form a part of the logical argument or course of action implied by tacit assumptions. Examples involving unspoken rules include unwritten and unofficial organizational hierarchies, organizational culture, and acceptable behavioral norms governing interactions between organizational members. These rules typically align with the behaviors of the local majority group and seem normal to them, but can be obscure, invisible, and exclusionary to minority groups.

This keyword could refer to multiple things. Here are some suggestions: