"Robert M. Gary" wrote in message
oups.com...
No, "or which has not subsequently been certified with such a system
installed"

91.215(b)
(3) Notwithstanding paragraph (b)(2) of this section, any aircraft
which^M
was not originally certificated with an engine-driven electrical
system or^M
which has not subsequently been certified with such a system
installed,^M

Added on after the fact is not "subsequently been certified with such a
system." That is from the local FSDO.