TIRBOP is the Title Insurance Rating Bureau of Pennsylvania. Here's an excerpt from their manual.
BTW, a revised manual has been issued effective 4-1-07. I will begin posting the changes this week. The revisions, I believe, are mainly references to the new ALTA 2006 policies which become mandatory in Pennsylvania for title commitments issued on or after 4-1-07.
LENDERS - PLEASE TAKE NOTE. TITLE INSURERS IN PENNSYLVANIA ARE REQUIRED TO USE THE ALTA 2006 FORMS. THE OLD FORMS WILL BE ENTIRELY UNAVAILABLE FOR ISSUANCE.