1. Formal regulations or guidelines that have been documented in writing and established as official standards
The written rules of the competition must be followed by all participants.
As regras escritas da competição devem ser seguidas por todos os participantes.
2. Documented procedures or standards established by an organization, institution, or governing body
The school's written rules prohibit students from using mobile phones in class.
As regras escritas da escola proíbem que os alunos usem telefones celulares em sala de aula.