28. If the contract governed by section 26 is printed:(a) unless otherwise specified in this Regulation, all required wording must be set in typeface equivalent to HELVETICA LIGHT of at least 10 points, with 12-point leading;
(b) all printed numerals must be set in typeface equivalent to HELVETICA BOLD of at least 12 points, with 14-point leading;
(c) the rest of the contract must be set in typeface equivalent to HELVETICA LIGHT of at least 8 points with 10-point leading;
(d) only roman or italic characters may be used;
(e) it must be printed in black or dark red ink.