If an agency does not deliver, or withdraws and does not resubmit, a final-form regulation within 2 years of the close of the original, extended or reopened public comment period for the proposed regulation, the agency is deemed to have withdrawn the regulation.
1 Pa. Code § 307.1
This section cited in 1 Pa. Code § 305.3 (relating to commission comments); 1 Pa. Code § 307.4 (relating to amending by withdrawing the regulation or tolling the review period); and 1 Pa. Code § 311a.5 (relating to delivery of a final regulation after the end of the legislative session).