Page "Bell–LaPadula model" Paragraph 8

With Bell-LaPadula, users can create content only at or above their own security level ( i. e. secret researchers can create secret or top-secret files but may not create public files ; no write-down ).

Conversely, users can view content only at or below their own security level ( i. e. secret researchers can view public or secret files, but may not view top-secret files ; no read-up ).