We also have the ability to validate a target object with custom a-la-carte constraints by passing the constraints inline as an struct of structs. This way you can store these constraint rules anywhere you like.
var myConstraints = {
login = { required=true, size=6..10 },
password = { required=true, size=6..10 }
};
prc.results = validateModel( target=user, constraints=myConstraints );
This will validate the object using the inline constraints that you built.