http://law.justia.com/us/cfr/title48/48-4.0.4.34.40.2.1.11.h...(b) The contracting officer has determined that for performance in the country of [contracting officer insert country of performance and check the appropriate block below]
o Workers' compensation laws exist that will cover local nationals and third country nationals.
o Workers' compensation laws do not exist that will cover local nationals and third country nationals.
Видимо, смысл в том, что в первом случае нормы действующего законодательства... распространяются на..., а во втором случае - не распространяются.