(a) Whenever a good behavior allowance is granted, withheld, forfeited, canceled or restored, in whole or in part, the director, or designee, shall provide the sheriff a copy of the updated facility record maintained pursuant to section 7356.1 of this Part.

(b) Upon the sentence of a youth to serve a definite sentence of imprisonment in a facility, the sheriff, or sheriff’s designee, shall establish the youth’s date of discharge by crediting the amount of jail time to which youth is entitled pursuant to section 70.30 of the Penal Law, and any good behavior allowances granted by a facility pursuant to this Part.

(c) After establishing a date of discharge pursuant to subdivision (b) of this section, or after any amendment of such date of discharge, the sheriff shall provide written notification to the director. Upon receipt, the director shall provide such written notification to the youth.