Complex sentence: The organisation is responsible to the IIHF for the good order of the sport in the United Kingdom and is charged with ensuring that all overseas players are properly cleared to play and that the rules and by-laws of the IIHF are upheld.
Split into simpler sentences: The organisation is responsible to the IIHF for the good order of the sport in the UK. The IHUK is charged with ensuring that all overseas players are properly cleared to play and that the rules and by-laws of the IIHF are upheld.