Pennsylvania constitution
Article I: declaration of rights
Section 17

No ex post facto law, nor any law impairing the obligation of contracts, or making irrevocable any grant of special privileges or immunities, shall be passed.

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Structure Pennsylvania constitution

Pennsylvania constitution

Article I: declaration of rights

Section 1

Section 2

Section 3

Section 4

Section 5

Section 6

Section 7

Section 8

Section 9

Section 10

Section 11

Section 12

Section 13

Section 14

Section 15

Section 16

Section 17

Section 18

Section 19

Section 20

Section 21

Section 22

Section 23

Section 24

Section 25

Section 26

Section 27

Section 28

Section 29