Y555SLD

I've always had it in my head that the maximum distance from the existing rear elevation for an extension within PD was 4m for detached houses and 3m for semis/terraced across the board. However reading the guidance in more detail, it appears that these limits are only applicable when building within 1m of the boundary: Does this mean, that as long as I am more than 1m from the boundary and meet all other criteria points (floor area, curtilage area, heights etc.) I can extend back from the rear elevation an unlimited distance? Thanks