USE CASE Font delivery YOU MUST Provide Copyright notices EITHER ATTRIBUTE Separate Text file OR ATTRIBUTE Human-readable Headers OR ATTRIBUTE Machine-readable Metadata fields ATTRIBUTE Easily Viewable YOU MUST Provide License text EITHER ATTRIBUTE Separate Text file OR ATTRIBUTE Human-readable Headers OR ATTRIBUTE Machine-readable Metadata fields ATTRIBUTE Easily Viewable IF Font Modification YOU MUST NOT Use Primary reserved font name YOU MUST Grant License ATTRIBUTE Original license YOU MUST NOT Promote YOU MUST NOT Sell Font ATTRIBUTE Stand-alone COPYLEFT CLAUSE Yes