ProhibitedMethod s shall not be Specified Substances.4.2.3 New Classes of Prohibited Substance sIn the event WADA expands the Prohibited List byadding a new class of Prohibited Substance sinaccordance with Article 4.1, WADA ’s ExecutiveCommittee shall determine whether any or allProhibited Substance s within the new class ofProhibited Substance s shall be consideredSpecified Substances under Article 4.2.2.