such requirements. 4510. Enhanced substitute safety compliance program (a) In general If the report required under section 4509(c) includes a determination that the substitute safety compliance program established under section 4509(a) is not adequate or that additional safety measures are necessary, then the Secretary may establish an enhanced substitute safety compliance program for fishing vessels or fish tender vessels (or both) that are substitute-eligible vessels and that comply with the requirements of section 4509. (b) Requirements The enhanced substitute safety compliance program established under this subsection shall include requirements for— (1) vessel construction