31Expenses awarded by the sheriff against the debtor in favour of the creditor in a determination under paragraph 30 above in respect of an application other than an application under paragraph 12(4) to (6) or 13 above shall be calculated, whether or not the application is opposed by the debtor, as if it were unopposed, except that, if the debtor opposes the application on grounds which appear to the sheriff to be frivolous, the sheriff may award an additional sum of expenses, not exceeding £25 or such amount as may be prescribed in regulations made by the Lord Advocate, against the debtor.