34. (1) Royalties may be charged to the holder of a commercial fishing licence in respect of the species of fish listed in Schedule D.  O. Reg. 261/05, s. 8. (2) Royalties shall be calculated and invoiced as follows: 1.  For fish harvested during the period beginning January 1 of the year and ending April 30 of the year, an interim invoice shall be issued by June 30 of the year and it shall be paid by July 31 of the same year. 2.  For fish harvested during the period beginning May 1 of the year and ending August 31 of the year, an interim invoice shall be issued by October 31 of the year and it shall be paid by November 30 of the same year. 3.  For fish harvested during the period beginning September 1 of the year and ending December 31 of the year, the interim invoice shall be issued by February 28 of the following year and it shall be paid by March 31 of that year. 4.  For fish harvested during the year but not already paid for, a final invoice shall be issued by May 31 of the following year and it shall be paid by June 30 of that year.  O. Reg. 261/05, s. 8; O. Reg. 352/15, s. 1 (1). (3) An interim invoice shall be calculated as follows: 1.  Calculate, by species and month, the number of pounds of unprocessed fish harvested by the person. 2.  Multiply that amount by the average price per pound for that species paid in the calendar year preceding the year of harvest in the economic zone in which the fish were harvested. 3.  Multiply the result of the calculations made under paragraph 2 by 0.05. 4.  Add the results for each species together.  O. Reg. 261/05, s. 8; O. Reg. 352/15, s. 1 (2, 3); O. Reg. 597/20, s. 1 (1). (4) An amount, if any, set out in the final invoice shall be calculated as follows: 1.  Calculate, by species, the number of pounds of unprocessed fish harvested by the month. 2.  Multiply that amount by the average price per pound for that species paid in the month of harvest in the economic zone in which the fish were harvested. 3.  Multiply the result of the calculations made under paragraph 2 by 0.05. 4.  Add the results together and then subtract any amounts paid on the interim invoices for the year.  O. Reg. 261/05, s. 8; O. Reg. 352/15, s. 1 (4, 5); O. Reg. 597/20, s. 1 (2). (5) A person shall pay interest on any amount that is invoiced and not paid when due at a rate to be determined by the Minister of Finance in accordance with section 10 of the Financial Administration Act.  O. Reg. 261/05, s. 8. (5.1) Despite anything in this section, (a)  no royalties are required to be paid for fish harvested between January 1 and December 31, 2020; and (b)  no interest is payable on any amount that is invoiced for fish harvested between January 1 and December 31, 2020, and any invoices issued for fish harvested between those dates are cancelled. O. Reg. 597/20, s. 1 (3). (6) A refund shall be made to a person if, (a)  the amount calculated under subsection (4) is negative; and (b)  the person will not be fishing the following year under the licence under which royalties were paid.  O. Reg. 261/05, s. 8. (7) A refund shall not be made to a person and shall instead be credited to the next royalty payment to be made if, (a)  the amount calculated under subsection (4) is negative; and (b)  the person has renewed the commercial fishing licence under which the royalties were paid.  O. Reg. 261/05, s. 8. part IV   miscellaneous Licence to Collect Fish for Scientific Purposes