2. The authorized period of supervised release is:

A. Any period of years for a person sentenced as a repeat sexual assault offender pursuant to section 1252, subsection 4-B; and

B. For a person not sentenced under section 1252, subsection subsections 4-B or 4-E, a period not to exceed 10 years for a Class A violation of section 253 and a period not to exceed 6 years for a Class B or Class C violation of section 253.; and

C.__Life for a person sentenced under section 1252, subsection 4-E.

3. During the period of supervised release specified in the sentence made pursuant to subsections 1 and 2, and upon application of a person on supervised release or the person's probation officer, or upon its own motion, the court may, after a hearing upon notice to the probation officer and the person on supervised release, modify the requirements imposed by the court, add further requirements authorized by section 1232, or relieve the person on supervised release of any requirement imposed by the court that, in its opinion, imposes on the person an unreasonable burden.

Notwithstanding this subsection, the court may grant, ex parte, a motion brought by the probation officer to add further requirements if the requirements are immediately necessary to protect the safety of an individual or the public and if all reasonable efforts have been made to give written or oral notice to the person on supervised release. Any requirements added pursuant to an ex parte motion do not take effect until written notice of the requirements, along with written notice of the scheduled date, time and place when the court will hold a hearing on the added requirements, is given to the person on supervised release.

4. On application of the probation officer, or of the person on supervised release, or on its own motion, and if warranted by the conduct of the person, the court may terminate a period of supervised release and discharge the convicted person at any time earlier than that provided in the sentence made pursuant to subsections 1 and 2. A termination and discharge may not be ordered upon the motion of the person on supervised release unless notice of the motion is given to the probation