3. Amendment of section 4 of the principal enactment

Section 4 of the principal enactment is hereby amended as follows:–

in subsection (1) of that section, by the substitution, for the words “ six per centum”, of the words “eight per centum” ; and

in the proviso to subsection (2) of that section by the substitution, for the words “six per centum”, of the words “eight per centum”. ;