(1) In this section, "assessable amount", in relation to a quarter, means the gross amount received by a registered undertaking by way of premiums in that quarter in respect of the health insurance business of the undertaking in the State on or after the establishment day, but excluding any amount - (a) so received in the course of or by way of reinsurance, or (b) so paid in respect of a stamp duty under section 125A of the Stamp Duties Consolidation Act 1999.

(2) A registered undertaking shall, within 30 days from the end of the quarter following the establishment day and within 30 days from the end of each quarter thereafter, deliver to the Authority a statement in writing showing the assessable amount for that undertaking in respect of that quarter.