Retail rates should be designed to reflect the actual, incurred cost of energy and therefore encourage energy conservation. The PTC should not incorporate declining blocks, demand charges or similar elements. The PTC for a particular customer class may be converted to a time of use design if the Commission finds it to be in the public interest.
52 Pa. Code § 69.1810
This section cited in 52 Pa. Code § 69.1801 (relating to scope); 52 Pa. Code § 69.1802 (relating to purpose); and 52 Pa. Code § 69.1803 (relating to definitions).