[ANSTHRLD] Identification of Complex Lines of Division

[Minar, Scott [PIC/BrenTX]]

I'm curious about how identification of a complex line is determined.  _Per
bend sinister wavy, sable and purpure, a bordure embattled argent_ was
returned for "unidentifiability of the line of division" per the decision in
the August 1992 LoAR on Landric Dægmær's device (see quote from LoAR below).

How does one know if a field divided between two tinctures is sufficiently
distinguishable?  What kind of division lines are clear enough to identify?
Per pale, per fess, and per bend seem to be acceptable--half the field is
one tincture, the other half another, in one clean line.  Quarterly and per
saltire also seem to be acceptable--alternating quarters of the field, by
means of two clean lines.

What about a chevron makes complex lines of division more clear?

Excerpts from the O&A.:

Arabella Eleanor Hamilton
The following device associated with this name was registered in December of
1999 (via Atenveldt):  Per chevron indented sable and purpure, two natural
seahorses Or and a winged sea-unicorn argent winged crined and armed Or.

Weltschin von Wertheim
The following device associated with this name was registered in November of
1995 (via the Outlands) and reblazoned in November of 1998 (via the
Outlands):  Per chevron rayonny sable and purpure, a cannon reversed and a
cannon in chevron argent issuing flames proper and a bison courant argent.
The following device associated with this name was registered in November of
1998 (via the Outlands):  Per chevron rayonny sable and purpure, a cannon
reversed and a cannon in chevron argent issuing flames proper and a buffalo
courant argent.