I used to regulate a local sanitary code that explicitly defined “‘should’ means ‘shall’; ‘shall’ means ‘must’” because lawyers do litigate over these terms.
Saved a lot of time and resources (and public health) where a juxtaposed word in an administrative order didn’t blow up a civil case.
In most cases ‘shall’ and ‘should’ is synonymous with ‘must’ for legal purposes.
[cries in RFC 2119]
I used to regulate a local sanitary code that explicitly defined “‘should’ means ‘shall’; ‘shall’ means ‘must’” because lawyers do litigate over these terms.
Saved a lot of time and resources (and public health) where a juxtaposed word in an administrative order didn’t blow up a civil case.