(a) Except as provided in subsections (b) and (c) of this section, an inmate who has been sentenced to a term of imprisonment shall be allowed deductions from the inmate’s term of confinement as provided under this subtitle for any period of presentence or postsentence confinement in a local correctional facility.

(b) (1) An inmate who is serving a sentence for a violation of § 3-303 or § 3-304 of the Criminal Law Article involving a victim who is a child under the age of 16 years, or an inmate who is serving a sentence for a violation of § 3-305 or § 3-306 of the Criminal Law Article, as the sections existed before October 1, 2017, involving a victim who is a child under the age of 16 years, may not be allowed deductions from the inmate’s term of confinement as provided under this subtitle for any period of presentence or postsentence confinement in a local correctional facility.

(2) This subsection may not be construed to require an inmate to serve a longer sentence of confinement than is authorized by the statute under which the inmate was convicted.

(c) (1) An inmate who is serving a sentence for a violation of § 3-307 of the Criminal Law Article involving a victim who is a child under the age of 16 years, who has previously been convicted of violating § 3-307 of the Criminal Law Article involving a victim who is a child under the age of 16 years, may not be allowed deductions from the inmate’s term of confinement as provided under this subtitle for any period of presentence or postsentence confinement in a local correctional facility.

(2) This subsection may not be construed to require an inmate to serve a longer sentence of confinement than is authorized by the statute under which the inmate was convicted.