Multilateral Agreement M334
  Under section 1.5.1 of ADR
  concerning safety adviser certificates in accordance with 1.8.3.7
  of ADR
  (1) By derogation from the provisions of 1.8.3.16.1 of ADR all
  certificates of training as safety adviser for the transport of
  dangerous goods the validity of which ends between 1 March 2020
  and 1 September 2021 remain valid until 30 September 2021. The
  validity of these certificates shall be extended from the date of
  their original date of expiry for five years if their holders
  have passed an examination in accordance with 1.8.3.16.2 of ADR
  before 1 October 2021.
  (2) This agreement shall be valid until 1 October 2021 for
  carriage on the territories of the ADR Contracting Parties
  signatory to this Agreement. If it is revoked before that date by
  one of the signatories, it shall remain valid until the
  above-mentioned date only for carriage on the territories of
  those ADR Contracting Parties signatory to this Agreement which
  have not revoked it.
  For the Competent Authority for
  ADR
  in the Republic of Latvia
  /Signed electronically/
  Ilonda Stepanova
State Secretary
  of the Ministry of Transport
  of the Republic of Latvia