TT nuclear devices in peacetime wherein numbers of personnel engaged in these tests have been previously exposed or will be continuously exposed to potential radiation hazards. It may become necessary from a study of personnel records to reduce the MPE for certain individuals who have recently been over-exposed to radiation. Further, the MPEs and MPLs are subject to revision by waiver from the task force commander in individually designated cases when circumstances indicate the need and justification therefor. Due to the special nature of field tests it is considered that a policy of strict adherence to the radiological standards prescribed for routine work is not realistic. The regulations set forth herein have been designed as a reasonable and safe compromise considering conservation of personnel exposures, the international import of the test and cost aspects of operational delays chargeable to excessive radiological precautions. In all cases other than emergencies or tactical Situations the ultimate criteria will be limited by the MPEs for per- sonnel. Special instances may arise such as in the case of an air-sea rescue within the RADEX or in the case of tactical situations in which operations will be carried out without regard to the MPEs and MPLs prescribed herein. For such emergency or tactical operations the criteria prescribed below for tactical situations will be used as a guide. Wherever possible, however, film badges will be carried and RadSafe monitors will accompany such operations to determine the extent of the actual radiation hazard experienced in order that appropriate medical action may be initiated. Task force radiation dosage control will start on first shot minus fifteen (15) days and terminate upon departure of individuals from the forward area or on the last shot plus fifteen (15) days, whichever occurs first. All personnel will be considered to have arrived at the Pacific Proving Ground by first shot minus fifteen (15) days. Prior and subsequent to. this period, radiation dosage control will be as prescribed by CTG 7.5. a. The MPE for personnel involved in this operation, as defined by Paragraph 4, above, is 3.9 roentgens (gamma only). This exposure may be acquired at any time during a thirteen (13) week period of the operation. Provided no previous over-exposure remains for compensation, 3.9 roentgens may be acquired without regard to the individual's past radiation history. This MPE will be considered further augmented (without separate action) by 0.3 roentgens per week for each week in excess of thirteen (13) weeks required during the operational period defined by paragraph 4, above. b. A special MPE of 20 roentgens (gamma only) is authorized for the operational period as defined by paragraph 4, above, for crew members of air sampling aircraft. 452