Acceptance of compensation under an award in a compensation order filed by the deputy commissioner, an administrative law judge, or the Board shall operate as an assignment to the employer of all rights of the person entitled to compensation to recover damages against such third person unless such person shall commence an action against such third person within six months after such acceptance. If the employer fails to commence an action against such third person within ninety days after the cause of action is assigned under this section, the right to bring such action shall revert to the person entitled to compensation. For the purpose of this subsection, the term “award” with respect to a compensation order means a formal order issued by the deputy commissioner, an administrative law judge, or Board.
33 USC § 933(b)
None identified. Default scope is assumed to be the entire title.