These Rules amend the Armed Forces (Court Martial) Rules 2009 (S.I. 2009/2041). The Rules make provision in respect of sentence review proceedings for a service offence further to section 304D (review of sentence following offer of assistance) and section 304E (review of sentence following failure to assist) of the Armed Forces Act 2006 (c. 52). Sections 304D and 304E were inserted into the Armed Forces Act 2006 by the Armed Forces Act 2016 (c. 21).