(1) The amount of tax due from enrolled persons for each year as specified in their certificate of enrolment shall be paid:
(2) In other cases the amount of tax due shall be paid in accordance with the provisions of sub-section (5) of section 5A or, as the case may be, sub-section (2) of section 7 or sub-section (5) of section 8.
(3) The tax payable under this Act shall be paid in the prescribed manner.
(4) All other dues shall be payable in the prescribed manner by such date as may be specified in the notice of demand and where no such date is specified, it shall be paid within 15 days from the date of service of the notice of demand.