(c)
Exceptions
(1)
Reasonable cause
No penalty shall be imposed by this section on any person for any failure which is shown to be due to reasonable cause and not to willful neglect.
(2)
Inability to correct previous failure
No penalty shall be imposed by this section on any failure by a person if such failure is attributable to a prior failure which has been penalized under this section and with respect to which the person has made all reasonable efforts to correct the failure.
(3)
Pre-1983 failures
No penalty shall be imposed by this section on any person for any failure which is attributable to a failure occurring before January 1, 1983, if the person has made all reasonable efforts to correct such pre-1983 failure.