(a) Rules in this part shall be complied with
in all weathers.
(b) The Rules concerning lights shall be complied
with from sunset to sunrise, and during such times no other lights
shall be exhibited, except such lights as cannot be mistaken for the
lights specified in these Rules or do not impair their visibility
or distinctive character, or interfere with the keeping of a proper
look-out.
(c) The lights prescribed by these Rules shall,
if carried, also be exhibited from sunrise to sunset in restricted
visibility and may be exhibited in all other circumstances when it
is deemed necessary.
(d) The Rules concerning shapes shall be complied
with by day.
(e) The lights and shapes specified in these Rules
shall comply with the provisions of Annex
I to these Regulations.