Sec. 1651. Compensation authorized. (a) Places of employment. (b) Definitions. (c) Liability as exclusive. (d) “Contractor” defined. (e) Contracts within section; waiver of application of section. (f) Liability to prisoners of war and protected persons. 1652. Computation of benefits; application to aliens and nonnationals. 1653. Compensation districts; judicial proceedings. 1654. Persons excluded from benefits.