4.2.4 New Classes of Prohibited Substances or Prohibited Methods In the event WADA  expands the Prohibited List by adding a new class of Prohibited Substances or Prohibited Methods in accordance with Article 4.1, WADA ’s Executive Committee shall determine whether any or all Prohibited Substances or Prohibited Methods within the new class shall be considered Specified Substances or Specified Methods under Article 4.2.2 or Substances of Abuse under Article 4.2.3.