In addition there are two other sets of regulations published in the Federal Register. One applies under normal operations (10 CFR 20) and the other set is for extremely unlikely accident conditions (10 CFR 100). They detail the allowable releases in these situations. These will be discussed further in Sections 5.1 and 5.2. In the 1967 criteria, Criterion 70 was the overriding criterion because it simply stated that the design must be such as to comply with these two radioactivity release regulations, 10 CFR 20 and 10 CFR 100. However, in the 1971 criteria, Criterion 60 ensures that the design will “maintain suitable control” over radioactive releases. during expected oc­currences while Criteria 16 and 50 ensure that containment will be provided with a suitable low leakage rate during accident conditions.