37.1 The measurement of the minimum width of wing
tanks and of the minimum vertical depth of double bottom tanks should
be taken and value of protective areas (PA
c and PA
s) should be calculated in accordance with the
“Interim recommendation for a unified interpretation of regulations 18.12 -18.15 - Protective
location of segregated ballast spaces” - set out in appendix 2.
37.2 Ships being built in accordance with this
interpretation should be regarded as meeting the requirements of regulations 18.12-18.15 and
would not need to be altered if different requirements were to result
from a later interpretation.
37.3 If, in the opinion of the Administration,
any oil tanker the keel of which was laid or which was at a similar
stage of construction before 1 July 1980 complies with the requirements
of regulation 18.12-18.15 without
taking into account the above Interim Recommendation, the Administration
may accept such tanker as complying with regulations 18.12-18.15.