Article 68 addresses the specific issue of rounding tax amounts on tax invoices, particularly when the calculated tax is a fraction of a single fils of a UAE Dirham. The provision does not prescribe the rounding method directly. Instead, it delegates this authority, mandating that the Executive Regulation of the Decree-Law shall specify the precise methodology for calculating and stating the total amount payable on the invoice in such cases. This ensures a standardised and legally-grounded approach to handling minimal tax values, providing clarity for businesses and preventing discrepancies in tax declarations and payments.