18 Pa.C.S.A. § 6106(b)(11)
Follow that link and read the law for yourself; don't take anyone else's word for it. I'm not an attorney. The exception you might be interested in is (b)(11), but you've really got to read paragraphs (a) and (b) for it all to make any sense.
If you want a second source with which to compare, you can browse the Pennsylvania statutes here, too: http://government.westlaw.com/linked...sp?SP=pac-1000
P.S. this isn't as off-topic as you'd think, because Pennsylvania does not distinguish between OC and CC when in a vehicle. So even if someone wishes to OC in a vehicle, they need to meet one or more of the criteria in paragraph (b) to the letter.