As I wrote in an earlier post on this thread, the way I have always looked at these "strictures" vs judgement, is not in an absolute, forbidden sense, but rather as warnings that the indications in the chart are subject to an undercurrent of greater uncertainty than is USUALLY the case whatever the form of divination used. The experience of various observers/practitioners over the centuries has developed these purely empirically-based "strictures", which rather should be renamed "warnings", because when these cosmic "markers" are present, experience has demonstrated that less obvious or even hidden undercurrents are especially active (at such times) which make the APPARENT indications less certain, or perhaps, less fixed, less likely to actually turn out as they APPEAR they should. Along this line of thinking I'll extend this view, definitelyto event charts, and even to natal charts (to a certain extent)
Allegedly the Via Combusta applies only to the Moon and only in horary; yet I believe I've seen difficulty even in natal charts with a planet (or Part or sensitive degree/cusp) in the Via Combusta. Again I'll state that I do not believe this or other "stricture" rules render a horary unfit for judgement (except the Dragon's Tail in the ascendant!); however I do believe that these astrological factors, when present, show that difficult, hidden, unsettling, perhaps even chaotic, influences are particularly at work at the time of the chart, requiring much more circumspection and insight in delineating that chart, than would otherwise be required.