I don't have much understanding of contract law, but the Judge applied the first paragraph of Article I, Section 10 of the Constitution. It reads:
No State shall enter into any Treaty, Alliance, or Confederation; grant Letters of Marque and Reprisal; coin Money; emit Bills of Credit; make any Thing but gold and silver Coin a Tender in Payment of Debts; pass any Bill of Attainder, ex post facto Law, or Law impairing the Obligation of Contracts, or grant any Title of Nobility.I am so glad that Judge Murguia is protecting our right to make and enforce contracts. If the city of Shawnee so desires, they can outlaw wood roofs or require that wood roofs be treated with fire-retardent chemicals for their citizen's safety, but they can neither break nor force contracts between their citizens.
Here's the whole decision. It's pretty short.