22.20 Application of section 2
Maritime Rules Part 22: Collision Prevention
(1) This section is to be complied with in all weathers.
(2) Lights required by this section are to be exhibited from sunset to sunrise. During this time the only other lights which may be exhibited are those lights which—
(a) cannot be mistaken for lights specified in this Part; and
(b) do not impair the visibility or distinctive character of lights specified in the rule; and
(c) do not interfere with the keeping of a proper look-out.
(3) The lights specified must, if carried, also be exhibited during the day in restricted visibility. They may also be exhibited in all other circumstances where it is considered necessary.
(4) The rules concerning shapes must be complied with by day.
(5) The lights and shapes specified in this rule must comply with the provisions of Appendix 1 of this Part.