Any vessel (or class of vessels) provided that she complies
with the requirements of the International Regulations for Preventing
Collisions at Sea, 1960, the keel of which is laid or which is at
a corresponding stage of construction before the entry into force
of these Regulations may be exempted from compliance therewith as
follows:
(a) The installation of lights with ranges prescribed
in Rule 22, until four years after
the date of entry into force of these Regulations.
(b) The installation of lights with colour specifications
as prescribed in section 7 of
Annex I to these Regulations, until four years after the date of entry
into force of these Regulations.
(c) The repositioning of lights as a result of
conversion from Imperial to metric units and rounding off measurement
figures, permanent exemption.
(d)
-
(i) The repositioning of masthead lights on vessels
of less than 150 metres in length, resulting from the prescriptions
of section 3(a) of Annex I to
these Regulations, permanent exemption.
-
(ii) The repositioning of masthead lights on vessels
of 150 metres or more in length, resulting from the prescriptions
of section 3(a) of Annex I to
these Regulations, until nine years after the date of entry into force
of these Regulations.
(e) The repositioning of masthead lights resulting
from the prescriptions of Section 2(b) of
Annex I to these Regulations, until nine years after the date of entry
into force of these Regulations.
(f) The repositioning of sidelights resulting
from the prescriptions of sections 2(g) and 3(b) of Annex I to these Regulations,
until nine years after the date of entry into force of these Regulations.
(g) The requirements for sound signal appliances
prescribed in Annex III to these
Regulations, until nine years after the date of entry into force of
these Regulations.
(h) The repositioning of all-round lights resulting
from the prescription of section 9(b) of
Annex I to these Regulations, permanent exemption.