MODEL PENAL CODE
A person commits a misdemeanor
if he purposely obstructs, impairs
or perverts the administration of law or other governmental function by
force, violence, physical interference or obstacle, breach of official
duty, or any other unlawful act, except that this Section does not apply
to flight by a person charged with
crime, refusal to submit to arrest, failure to perform a legal duty other
than an official duty, or any other means of avoiding compliance with law
without affirmative interference with governmental functions.