Article 7 Timing of payment of fees
Where a test fee is payable, the Secretary of State shall—
on receipt of an application for testing of apparatus, estimate in complete periods of 15 minutes the time to be taken in conducting the test and thereby estimate the amount to be payable in accordance with article 5 above, and shall serve an invoice on the applicant for the amount so estimated, which shall thereupon be due and payable to the Secretary of State.
on completion of the test, the Secretary of State shall—
serve an invoice on the applicant for the final amount of the test fee, which shall thereupon, and before disclosure of the test report, be due and payable to the Secretary of State; or
if the amount received under paragraph (1)(a) above exceeds the final amount of the test fee, repay the balance to the applicant.
Where a variable fee is payable, the Secretary of State shall on completion of the visit notify the applicant of the amount of the variable fee which shall thereupon, and before disclosure and notification of the result of the application, be due and payable to the Secretary of State.
The fixed fee shall be due and payable on the making of the application for approval.