The annual review of the RFU Regulations has been completed and the updated regulations are available on the England Rugby website as of 1 August 2015. See Link
A number of changes have been made to various RFU Regulations including:
Regulation 1 (Definitions)
Regulation 5 (Financial)
Regulation 9 (Player Safety)
Regulation 11 (Season)
Regulation 13 (Adult Male Competitions)
Regulation 14 (Registration of Adult Male Players)
Regulation 15 (Age Grade Rugby)
Regulation 16 (Adult Women Competitions)
Regulation 19 (Discipline)
Regulation 20 (Anti-Doping)
Regulation 21 (Safeguarding)

Please note that Sussex RFU has adopted the new regulations for U7 - U12 and the link to the Sussex RFU site can be found here

For Youth Rugby the Sussex Web site has a list of the RFU regulations per age group along with other related documents that Coaches and Team Managers will find of use - see here