(a) Any knowing violation by a gun offender of this subchapter or of rules or regulations established pursuant to this subchapter, including knowingly failing to register, verify, or update information in the manner and within the time periods provided for in this subchapter, shall be a misdemeanor punishable by a fine of not more than $1,000, imprisonment of not more than 12 months, or both.
(b) Compliance with the requirements of this subchapter, including any rules or regulations adopted by the Chief pursuant to this subchapter, shall be a mandatory condition after the expiration of any time being served on probation, parole, supervised release, or conditional release for any gun offender convicted in the District of Columbia.