Carbar
Rule 5 is not applicable in any landing/take off, irrespective of whether the field is licensed or not.
The 1500ft rule does not apply at licensed airfields and, as of this year, permit aircraft can now land/TO at licensed airfields where flight over congested areas is required.
I'm sure that's what G meant to say, too.
The draft ammendments to Rule 5 list PFLs as being an exception too.