(a) Act means the Longshoremen's and Harbor Workers' Compensation Act.

(b) Board means the Board of Investigation.

(c) Administration means the Occupational Safety and Health Administration.

(d) Assistant Secretary means the Assistant Secretary for Occupational Safety and Health.

(e) Injury means accidental injury or death arising out of and in the course of employment, and such occupational disease or infection as arises naturally out of such employment or as naturally or unavoidably results from such accidental injury.