Article V explains the amendment process, which is different and more difficult than the process for making laws. When two-thirds of the Senate and two-thirds of the House of Representatives vote to change the Constitution, an amendment goes to the state legislatures for a vote.
Another way to use the fridge for brief cold stratification is to plant the seeds in individual jiffy pellets and put them in either a plastic covered container (such as for home baking little bread loaves) or in a store-bought greenhouse flat. Depends on how much room you have in your fridge.
Seed can be stratified in any convenient, waterproof container. Zip-top plastic bags can be purchased from many plastic companies. The 4-inch by 6-inch size with a white label area is excellent. Write on the bag the identity of the seeds; i.e., the name of the pod parent, an X, and then the name of the pollen parent. Place the seeds in the bag and add a few drops of sterile water.