; (B) the child or a parent or legal guardian of such child revokes or disables the registration of the account of such child with the large social media platform; (C) the third-party safety software provider rejects the delegation; or (D) one or more of the affirmations made by the third-party safety software provider under subsection (b)(1)(A) is no longer true. (3) Secure transfer of user data A large social media platform provider shall establish and implement reasonable policies, practices, and procedures regarding the secure transfer of user data pursuant to a delegation under paragraph (1) from the large social media platform to a third-party safety software provider in order to mitigate any risks related to user data. (4) Disclosure In the case of a delegation made by a child or a parent or legal guardian of a child under paragraph (1) with respect to the account of such child with a large social media platform, the large social media platform provider shall— (A) disclose to such child and (if the parent or legal guardian made the delegation) the parent or legal guardian the fact that the delegation has been made; (B) provide to such child and (if such parent or legal guardian made the delegation) such parent or legal guardian a summary of the user data that is transferred to the third-party safety software provider; and (C) update the summary provided under subparagraph (B) as necessary to reflect any change to the user data that is transferred to the third-party safety software provider. (b) Registration with Commission (1) Third-party safety software providers (A) Registration A third-party safety software provider shall register with the Commission as a condition of accessing an application programming interface and any information under subsection (a). Such registration shall require the third-party safety software provider to affirm that the third-party safety software provider— (i) is a company based in the United States; (ii) is solely engaged in the business of internet safety