31 Pa. Code § 84c.4
(a) Segmented reserves. Segmented reserves shall be calculated as follows:
(3) The net premiums within each segment are a uniform percentage of the respective guaranteed gross premiums within the segment. The uniform percentage for each segment is such that, at the beginning of the segment, the present value of the net premiums within the segment equals the present value of the death benefits within the segment, plus the present value of any unusual guaranteed cash value occurring at the end of the segment, less any unusual guaranteed cash value occurring at the start of the segment, plus for the first segment only, the excess of subparagraph (i) over subparagraph (ii), as follows:
(b) Contract segmentation method. The contract segmentation method is the method of dividing the period from issue to mandatory expiration of a policy into successive segments. The segments shall be calculated as follows:
(1) The length of a particular contract segment shall be set equal to the minimum of the value t for which Gt is greater than Rt (if Gt never exceeds Rt the segment length is deemed to be the number of years from the beginning of the segment to the mandatory expiration date of the policy), where Gt and Rt are as follows:

(2) The symbols used in paragraph (1) have the following meanings:
(c) Unitary reserves. Unitary reserves shall be calculated as follows:
(2) Modified net premiums are a uniform percentage of the respective guaranteed gross premiums, where the uniform percentage is such that, at issue, the present value of the net premiums equals the present value of all death benefits and pure endowments, plus the excess of subparagraph (i) over subparagraph (ii), as follows: