"(3) Where evidence is given in a proceeding under
section 243B that the value of the defendant's
property after he engaged in a particular
prescribed narcotics dealing, or after the end
of a particular period during which he engaged
in prescribed narcotics dealings, exceeded the
value of the defendant's property before he
engaged in that dealing, or before the
commencement of that period, then, for the
purposes of sub-section (2) of that section,
the Court shall, subject to sub-section (4),
treat the value of benefits derived by the
defendant by reasons of his having engaged in
that dealing or in prescribed narcotics
dealings during that period as being not less
than the amount of the excess.
(4) Where, after evidence has been given in a
proceeding under section 243B that the value
of the defendant's property after he engaged
in a particular prescribed narcotics dealing,
or after the end of a particular period,
exceeded the value of the defendant's property
before he engaged in that dealing, or before
the commencement of that period, the defendant
satisfies the Court that the whole or a part
of the excess was due to certain causes, being
causes unrelated to his having engaged in that
prescribed narcotics dealing, or in prescribed
narcotics dealings during that period, as the
case may be -
(a) if the defendant so satisfied the Court
in respect of the whole of the excess -
sub-section (3) does not apply to the
excess; or
(b) if the defendant so satisfies the Court
in respect of a part of the excess -
sub-section (3) applies to and in
relation to the excess as if it were
reduced by the amount of that part."