The guidelines of the Doctrine Declaration (“Ficha Doutrinária”) dated 04 December 2017 clarify tax liabilities based on nº 5 of article 81º of the IRS Code. Assessment of income from foreign sources classified under categories E (capital), F (long-term rent) and G (capital gains) earned by taxable persons considered to be Non-Habitual Residents follows the exemption method where the source country has the power to tax this income under the applicable Double Taxation Agreement. This rule infers that the tax exclusion does not hold for jurisdictions without such an agreement in place. Tax-exempt income must still be reported annually in Portugal to determine the final tax rate to be applied to total aggregate income subject to assessment.