The rules presented in this section of the site are expected to apply to all modes of play (whether modeling 3e, 4e, or something else entirely). Unless otherwise indicated or overruled in those modes, of course.
In the absence of specific rules being written here, it is probably safest to extrapolate from the rules in the PRD. I expect to revise how things work in the details, but generally things should have similar shape.
It occurs to me that, given the long history of Echelon, and the many changes you have made to it, that this collection of pages probably ought to have “date last modified” on them somewhere.
That’s totally fair. Though the publication date comes pretty close, very few posts have substantive edits (fixing typos, yes, changing intent or meaning, no).
The entire thing is due for an overhaul, really.