Response: I would say yes a ULC minister is a legal minister and should be able to perform your wedding. You can check with your local clerks office to make sure. You could also check on the http://www.ulc.net forum.
Here is what PA law states on the matter:
1503. Persons qualified to solemnize marriages.
a General rule.--The following are authorized to solemnize marriages between persons that produce a marriage license issued under this part:
A justice, judge or district justice of this Commonwealth.
A former or retired justice, judge or district justice of this Commonwealth who is serving as a senior judge or senior district justice as provided or prescribed by law.
An active or senior judge or full-time magistrate of the District Courts of the United States for the Eastern, Middle or Western District of Pennsylvania.
An active or senior judge of the United States Court of Appeals for the Third Circuit who is a resident of this Commonwealth.
A mayor of any city or borough of this Commonwealth.
A minister, priest or rabbi of any regularly established church or congregation.
b Religious organizations.--Every religious society, religious institution or religious organization in this Commonwealth may join persons together in marriage when at least one of the persons is a member of the society, institution or organization, according to the rules and customs of the society, institution or organization.
c Marriage license needed to officiate.--No person or religious organization qualified to perform marriages shall officiate at a marriage ceremony without the parties having obtained a marriage license issued under this part.
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