Rule reminder
Passive periphrasis summary: 'essere + pp' = state or general passive; 'venire + pp' = process/action (habitual); 'andare + pp' = obligation/necessity. In English, all three often translate as 'is/are + pp', but the nuance differs. Context, agent presence, and whether something is habitual, obligatory, or descriptive determines which Italian form to use.
How would you say in Italian 'The new policy must be followed by all employees'? (obligation)