(a) Except as provided in subsection (b) of this section, use or possession of cannabis by a person that does not violate section 21a-279a or chapter 420f shall not be grounds for revocation of such person's parole, special parole or probation.
(b) If a person's conditions of parole, special parole or probation include a finding that use of cannabis would pose a danger to such person or to the public and a condition that such person not use cannabis and individualized reasons supporting such finding, use of cannabis may be grounds for revocation of parole, special parole or probation. Such finding shall not consider any prior arrests or convictions for use or possession of cannabis.