Transposing Council Directive 2014/107/EU of 9 December 2014, amending Directive 2011/16/EU as regards mandatory automatic exchange of information in the field of taxation (DAC 2), Portuguese Decree-Law 64/2016, of 11 October, assumes domestically the FACTA and the OECD Common Reporting Standard (CRS), concerning mandatory communication of financial information for tax purposes and mandatory automatic exchange of that financial information.
Portugal also transposed DAC 3 (transfer pricing), DAC 4 (CbCR), DAC 5 (money laundering), DAC 6 (reportable cross-border arrangements) and DAC 7 (improvement administrative cooperation and reporting by platform operators) – Portugal is also finalizing the transposition of DAC 8 (improvement administrative cooperation and reporting crypto-asset service providers).
In the context of this Survey it matters DAC 6, the Council Directive (EU) 2018/822 of 25 May 2018, amending Directive 2011/16/EU as regards mandatory automatic exchange of information in the field of taxation in relation to reportable cross-border arrangements, faithfully transposed domestically by the Portuguese Law 26/2020, of 21 July (complemented by the Decree-Law 53/2020, of 11 August). 
This Law 26/2020 revoke the former Decree-Law 29/2008, of 25 February, which regulated, in a pioneering way, a operation/transaction/arrangement/scheme mandatory disclosure/reporting to promoters/users, preventing and pursuing the aggressive tax planning related to one of the following hallmarks, applicable to all sectors/groups: (i) participation of an entity subject to a clearly more favourable tax regime or total or partial tax exempt; (ii) financial or insurance operations giving rising to a requalification of the income or to a identification of a new beneficiary; (iii) use of tax losses; (iv) all schemes of tax planning with a clause waiving or limiting the promoter liability.
However, Law 26/2020, following the path of the Decree-Law 29/2008, also imposes the report of the domestic arrangements.