The AICPA issued Technical Question and Answer (TQA) 9510.04, Performing Agreed-Upon Procedures Engagements Related to Third-Party Audit Requirements under the EPA Hydrofluorocarbon (HFC) Phase Down Program, in May 2024, to provide:
Background and nonauthoritative guidance about the auditing requirements in the Environmental Protection Agency’s (EPA) Hydrofluorocarbon (HFC) Allocation Framework final rule.
Illustrative procedures that CPAs may perform as part of an engagement with a producer, importer, or exporter of regulated HFCs.
In April 2025, the EPA released updated guidance