Section 28 of the Principal Act is hereby amended -
(a) by the insertion after "invoice," of "monthly control statement, claim,", and
(b) by the substitution of "£750" for "£500".
Section 28 of the Principal Act is hereby amended -
(a) by the insertion after "invoice," of "monthly control statement, claim,", and
(b) by the substitution of "£750" for "£500".