; and (F) identification of gaps or resource deficiencies in coordinating and collaborating activities described in subparagraphs (A) through (E) to combat the online sale of fentanyl and methamphetamine; (4) models utilized by providers, including machine learning, algorithmic technology, and data analysis techniques, to effectively detect and combat the sale of fentanyl and methamphetamine on their platforms; (5) enforcement mechanisms and processes employed by providers to penalize users involved in the sale of fentanyl and methamphetamine, including user identification, verification procedures, and subsequent actions, such as account suspension, reporting to law enforcement agencies, and collaboration with legal proceedings; and (6) analysis of referrals to the Federal Government by providers detailing information about online sales of fentanyl and methamphetamine, including— (A) the number of referrals from providers to the Federal Government; (B) the number of referrals that were investigated by the Federal Government, including the agencies involved in the investigation and the outcome of the investigation; (C) the number of referrals that resulted in an arrest, prosecution, or conviction, including the offense of the arrest, prosecution, or conviction; and (D) the number of referrals that were shared by the Federal Government with a State, Tribal, or local government, including a law enforcement agency or prosecutor's office. (b) Report required Not later than 1 year after the date of enactment of this Act, the Comptroller General of the United States shall submit to Congress a report containing all findings and determinations made in carrying out the study required under subsection (a).