Replaced the "General Statutes" in 1920; currently updated via session laws referred to as chapters within yearly acts (i.e., Chapter 75 of the Acts of 1986).
Before 1970, there was no official codification of Pennsylvania's statutes; the proprietary codification by Purdon was a de facto standard. As the official code is incomplete, the Purdon code is still in use for some topics. [3]