A system for controlling a relationship between first and second bodies and made up of a suture assembly with at least a first suture configured to define a restrictable loop structure with the suture assembly in an operative state. At least first and second restrictable sub-loops cooperatively define a first loop that can be reduced in size to thereby produce a force on the first and second bodies that urges them towards each other. A first loop length has a first sliding portion with a second loop length having a second sliding portion. At least one knot extends around the first and second sliding portions. The first and second sliding portions, upon each being moved within the at least one knot in a tightening sliding direction, cause a size of a respective sub-loop to be reduced.
