The Pennsylvania Uniform Construction Code Review and Advisory Council announced on May 1, 2018 that the Council has voted in favor of adopting the 2015 IECC with minimal PA-specific amendments. These amendments are actually elements taken from the 2018 IECC, which streamlines many commissioning processes and simplifies certain language. You can find those amendments here.
Starting on June 1, 2017 and continuing for several weeks, two "icehouses" were on display in Harrisburg: one is built to the specifications of the state's energy code (2009 IECC) while the other is built to a more modern standard of construction. USGBC Central Pennsylvania used these icehouses to foster discussion about "unfreezing" the state's energy code during their Demonstration Day on Tuesday, June 6.
House Bill 568, which passed the Senate on July 11, 2016, will direct Pennsylvania to immediately reopen its Uniform Construction Code (UCC) update process and consider changes made in the 2015 IECC as well as selected sections of the 2012 IECC. This bill follows an unsuccessful attempt to meaningfully update the state code in 2015, after which the Clean Air Council challenged the decision of the UCC Review and Advisory Council not to adopt the 2015 IECC. UPDATE: This suit was denied, and CAC is considering an appeal to the court's decision.
As for code compliance, HB 1543 would provide some additional funding for training code officials. Also, the Pennsylvania Energy Codes Toolkit offers monthly webinars, forms, instructional videos, and other resources to help improve compliance with the state's residential energy code. Also offered are free code consultations for builders and a new free iPad code inspection app. These services are being offered as part of a three year state code compliance study.