What are the incorrect statements regarding the disposition process for Class I (not Class II) Engineering Change Proposals (ECPs)?

1. Disposition must be approved or disapproved for implementation by a properly constituted Government Configuration Control Board
2. Unless otherwise specified in the contract, the government administrative contracting officer or plant representative serves as the disposition authority
3. Government concurrence in normally allows the contractor to incorporate the change in applicable item and update its configuration documentation without anyfurther government action or authorization being required
4. The default action is concurrence/non-concurrence in classification only, unless the contract requires approval/disapproval.