Wee ee mr me me et ree me ee pr a ot limit of 0.17 rem per person averaged over the population will continue. rem and roentgen (R) The are radiation units. The new recommendations lower the permissible exposurelevels in a number of specific instances including the occupational exposure of pregnant women. Lower levels are also specified for exposure of the thyroid gland and parts of the skin. The report also includes new dose limits for exposure of individuals working in radiation accidents or emergencies. Exposure levels for families of patients containing radioactive materials are also specified. ~ Regarding the occupational exposure of fertile women, the Council's recommendations specify that, "During the entire gestation period, the maximum permissible dose equivalent to the fetus from occupational exposure of the expectant mother should not exceed 0.5 rem" (page 92).