; and (III) was live or near-live at the time it was initially made available; (iii) shall— (I) define categories of entities engaged in making available video programming using Internet protocol or any successor protocol; and (II) apportion the responsibilities for the provision, quality, pass-through, and performance of audio description among the entities identified by the Commission under subclause (I)— (aa) to ensure full access by viewers; (bb) to ensure that the regulations can be enforced effectively against responsible parties; and (cc) to ensure that audio description data remains with the video programming to which the data is added and is distributed in common formats so that audio description can be exhibited intact by all other entities that subsequently make the programming available to viewers; (iv) shall require that an entity engaged in making available user-generated video, whether or not the entity is also engaged in making available video that is not user-generated video, provides easy-to-use authoring tools that— (I) permit users who post videos on the entity’s platform to add audio description; and (II) conspicuously prompt users who post videos on the entity’s platform to use the tools; (v) shall provide that audio described programming made available using Internet protocol or any successor protocol shall— (I) be labeled and searchable or otherwise easily discoverable through navigation devices, apparatuses, applications, and other methods on which the programming is made available; and (II) include a recognizable tone at the beginning of the programming on all audio channels provided in the same languages as the available audio description streams to indicate that audio description is available in those languages; (vi) shall provide that audio description of video programming made available using Internet protocol or any successor protocol shall be provided on an audio track solely dedicated to audio description, so long as it is achievable (as defined in section 716)