1. (1) The merit time allowance is one-third of the minimum term or period imposed by the court for an inmate convicted of an A-1 felony under article 220 of the Penal law and one-sixth of the minimum term or period imposed by the court for an inmate convicted of any other eligible offense.

2. (2) An inmate serving a sentence for any Class A-II through Class E drug offense may earn supplemental merit time in the amount of an additional one-sixth of the minimum period of the sentence imposed for the drug felony if he or she has either:

   1. (i) completed two or more of the four possible merit program objectives listed in section 280.2(d)(1)(ii) of this Part; or

   2. (ii) completed one of the four and also successfully maintained employment in a work release program or other continuous temporary release program for a period of not less than three months.

      (b) Determinate sentences.

      The merit time allowance is an additional one-seventh of the determinate term imposed by the court for an eligible offense.

(a) Indeterminate sentences.