Weak respiratory muscles may suddenly fatigue, producing precipitous respiratory collapse. Elective intubation is preferable to emergency intubation or respiratory arrest. The standard 20/30 rule (FVC less than 20 ml/kg or NIF less than 30 cmH20) are the best indicators of the need for ventilator support.
Imminent lawless action is a term used in the United States Supreme Court case Brandenburg v. Ohio (1969) to define the limits of constitutionally protected speech. The decision overturned the decision of the earlier Schenck v. United States (1919), which had established clear and present danger as the constitutional limit for speech.
This use of this law by State of the Virginia was tested in Buck vs. Bell, heard before the Supreme Court in 1927. Oliver Wendell Holmes delivered the Court's opinion upholding the legality of eugenic sterilization, which included the infamous phrase Three generations of imbeciles are enough.. In Skinner vs. Oklahoma (1942), the Supreme Court struck down a law allowing the involuntary sterilization of criminals.