; and (B) using the evaluation framework under subsection (c) to assess the effects of the waiver, including the metrics to best gauge the effects on safety, there is sufficient data and other information to support that the alternative technology, practice, or system under the waiver achieves a level of safety that is equivalent to or greater than the level of safety under the applicable regulation. (2) Alternative compliance approaches As part of the revised regulation described in paragraph (1), the Secretary may allow a person, at the person’s discretion, to comply with— (A) the regulation as in effect on the day before the date of the revision under paragraph (1)