Halliday & Matthiessen (2014: 304):
The projected clause may be either (a) a proposition, realised by a finite clause, as in Mr Deshmukh said that some dissidents had met him and asked him whether they should vote according to their conscience or discretion; or (b) a proposal, realised by a perfective non-finite clause, as in Bush urges China to release crew; … The proposal may be expressed alternatively by a modulated finite clause: Yet somebody told me that I mustn’t repudiate my non-fiction …