Complex sentence: The same applies to stopping open defecation at a community-wide level and providing access to improved sanitation, i.e. access to toilets and the entire sanitation chain that should be connected to it (collection, transport, disposal or reuse of human excreta).
Split into simpler sentences: The same applies to stopping open defecation at a community-wide level and providing access to improved sanitation. This means use of toilets and implementation of the entire sanitation chain connected to the toilets (collection, transport, disposal or reuse of human excreta).