[Brick]

From Chapter 2 of the 1776 Constitution

Sect. 5. The freemen of this commonwealth and their sons shall be trained and armed for its defence under such regulations, restrictions, and exceptions as the general assembly shall by law direct, preserving always to the people the right of chusing their colonel and all commissioned officers under that rank, in such manner and as often as by the said laws shall be directed.

From Article VI of the 1790 Constitution

Of the militia.
Sect. II. The freemen of this commonwealth shall be armed and disciplined for its defence. Those who conscientiously scruple to bear arms, shall not be compelled to do so; but shall pay an equivalent for personal service. The militia officers shall be appointed in such manner, and for such time, as shall be directed by law.

(Interesting Note: Militiamen no longer elect their own officers)

From Contitution of 1874

ARTICLE XI
MILITIA

Organization of militia. Exemption authorized.
Section 1. The freemen of this Commonwealth shall be armed, organized and disciplined for its defence when and in such manner as may be directed by law. The General Assembly shall provide for maintaining the militia by appropriations from the Treasury of the Commonwealth, and may exempt from military service persons having conscientious scruples against bearing arms.

From Constitution of 1968

National Guard to be Organized and Maintained
Section 16.

The citizens of this Commonwealth shall be armed, organized and disciplined for its defense when and in such manner as may be directed by law. The General Assembly shall provide for maintaining the National Guard by appropriations from the Treasury of the Commonwealth, and may exempt from State military service persons having conscientious scruples against bearing arms. D. Other Legislation Specifically Authorized


So if we go back to the 1776 version all freemen and their sons where eligible for militia call as required by (other) laws. The current Constitution states all Citizens (I suppose regardless of gender) as required by law. But there doesn't seem to be any other law on this subject.

I'll be glad when Pa gets all their laws on the web!